2BWX2-FINGERSONICMIDI Devices

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Shenzhen HTT Technology Co., Ltd. Report No.: HTT202606685 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 1 of 4 Product Name: MIDI Devices Model No.: Fingersonic Keys EUT Constructional Details External Photo Report No.: HTT202606685 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 2 of 4 Report No.: HTT202606685 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 3 of 4 Report No.: HTT202606685 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 4 of 4 ------End------

Label and Location Size: L: 3.0cm*W: 2.0cm Label and Location FCC ID : 2BWX2-FINGERSONIC

Shenzhen HTT Technology Co., Ltd. Report No.: HTT202606685 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 1 of 3 Product Name: MIDI Devices Model No.: Fingersonic Keys EUT Constructional Details Internal Photo Report No.: HTT202606685 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 2 of 3 ANTENNA Report No.: HTT202606685 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 3 of 3 ------End------

Shenzhen HTT Technology Co., Ltd. Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 1 of 10 RF Exposure evaluation Report Reference No. ..................... : FCC ID............................................. : HTT202606685F03 2BWX2-FINGERSONIC Compiled by ( position+printed name+signature) . : File administrators Heber He Supervised by ( position+printed name+signature) . : Project Engineer Bruce Zhu Approved by ( position+printed name+signature) . : RF Manager Kevin Yang Date of issue .................................... : Jun. 30, 2026 Testing Laboratory Name .............. : Shenzhen HTT Technology Co.,Ltd. Address ............................................ : 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao’an District, Shenzhen, Guangdong, China Applicant’s name ............................ : Hangzhou Zhilegu Technology Co., Ltd. Address ............................................ : Room 204, Building 8, Angel Village, Dream Town, Cangqian Subdistrict, Yuhang District, Hangzhou, Zhejiang Province, China Standard ........................................... : 47CFR §1.1310 47CFR §2.1093 KDB447498 D01 General RF Exposure Guidance v06 Shenzhen HTT Technology Co.,Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen HTT Technology Co.,Ltd. is acknowledged as copyright owner and source of the material. Shenzhen HTT Technology Co.,Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description ..................... : MIDI Devices Manufacturer .................................... : Hangzhou Zhilegu Technology Co., Ltd. Trade Mark ........................................ Fingersonic Model/Type reference ...................... : Fingersonic Keys Rating ............................................... : DC 3.7V From Battery and DC 5V From External Circuit Result ............................................... : PASS Report No.: HTT202606685F03 Page 2 of 10 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 2 of 10 T E S T R E P O R T Equipment under Test : MIDI Devices Model /Type : Fingersonic Keys Listed Models : Fingersonic Guitar, Fingersonic Beats Model Declaration The PCB board, circuit, structure and internal of these models are the same, Only model number is different for these model. Applicant : Hangzhou Zhilegu Technology Co., Ltd. Address : Room 204, Building 8, Angel Village, Dream Town, Cangqian Subdistrict, Yuhang District, Hangzhou, Zhejiang Province, China Manufacturer : Hangzhou Zhilegu Technology Co., Ltd. Address : Room 204, Building 8, Angel Village, Dream Town, Cangqian Subdistrict, Yuhang District, Hangzhou, Zhejiang Province, China Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: HTT202606685F03 Page 3 of 10 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 3 of 10 Contents 1 T E S T S T A N D A R D S ................................................... 4 2 S U M M A R Y .............................................................. 5 2.1 General Remarks 5 2.2 Product Description 5 2.3 Special Accessories 6 2.4 Modifications 6 3 T E S T E N V I R O N M E N T 7 3.1 Address of the test laboratory 7 3.2 Test Facility 7 3.3 Statement of the measurement uncertainty 7 4 T E S T L I M I T 8 4.1 Requirement 8 4.2 Conducted Power Results 9 4.3 Manufacturing tolerance 9 4.4 Evaluation Result 10 4.5 Simultaneous Transmission for SAR Exclusion 10 5 C O N C L U S I O N 10 Report No.: HTT202606685F03 Page 4 of 10 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 4 of 10 1 T E S T S T A N D A R D S The tests were performed according to following standards: ANSI C95.1–1999: IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz. FCC KDB 447498 D01 General RF Exposure Guidance v06: Mobile and Portable Device, RF Exposure, Equipment Authorization Procedures. FCC CFR 47 part1 1.1310: Radiofrequency radiation exposure limits. FCC CFR 47 part2 2.1093: Radiofrequency radiation exposure evaluation: portable devices Report No.: HTT202606685F03 Page 5 of 10 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 5 of 10 2 S U M M A R Y 2.1 General Remarks Date of receipt of test sample : Jun. 17, 2026 Testing commenced on : Jun. 17, 2026 Testing concluded on : Jun. 30, 2026 2.2 Product Description Product Description: MIDI Devices Model/Type reference: Fingersonic Keys Power supply: DC 3.7V From Battery and DC 5V From External Circuit Adapter Information (Auxiliary test provided by the lab): Model: GS-0500200 Input: AC100-240V, 50/60Hz, 0.3A max Output: DC 5V, 2A Testing sample ID： HTT202606685-1# (Engineer sample) HTT202606685-2# (Normal sample) Hardware version: 1.0 Software version: 1.0 Bluetoot…

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Approval sheet Page 1 of 9 ASC_RFANT5220110A0T_V13 Sep. 2012 *Contents in this sheet are subject to change without prior notice MULTILAYER CERAMIC ANTENNA RFANT Pb free Series – RoHS Compliance Halogens Free Product 2.4 GHz ISM Band Working Frequency P/N: RFANT5220110A0T . Walsin Technology Corporation – Sales & Operations Headquarters No.566-1, Kao-Shi Rd., Yangmei District, Taoyuan Approval sheet Page 2 of 9 ASC_RFANT5220110A0T_V13 Sep. 2012 FEATURES 1. Surface Mounted Devices with a small dimension of 5.2 x 2.0 x 1.1 mm 3 meet future miniaturization trend. 2. Embedded and LTCC (Low Temperature Co-fired Ceramic) technology is able to future integrate with system design as well as beautifying the housing of final product. 3. High Stability in Temperature / Humidity Change APPLICATIONS 1. Bluetooth 2. Wireless LAN 3. HormRF 4. ISM band 2.4GHz wireless applications DESCRIPTION Walsin Technology Corporation develops a new ceramic embedded antenna specified for 2.4 GHz ISM Band application, as shown in below “CONSTRUCTION”. Both of Wireless LAN IEEE 802.11b and Bluetooth TM typically located on this unlicensed frequency band which range covers from 2.4GHz to 2.4835GHz. To fulfil the friendly usage for antenna, this antenna has been designed to a typical 150MHz bandwidth through Walsin’s advanced LTCC (Low Temperature Co-fired Ceramic) technology and superior product design via 3D EM Simulation Skill. This antenna has a rectangular ceramic body with a tiny dimension of 5.2x 2.0 x 1.1 mm 3 meet the future SMT automation and miniaturization requirements on modern portable devices. CONSTRUCTION Identification mark Soldering terminal W T C W T C Feeding Identification mark Soldering terminal W T C W T C Feeding DIMENSIONS Figure Symbol Dimension L 5.20 ± 0.20 mm W 2.00 ± 0.20 mm T 1.15 ± 0.10 mm A 0.40 ± 0.25 mm Approval sheet Page 3 of 9 ASC_RFANT5220110A0T_V13 Sep. 2012 SOLDER LAND PATTERN DESIGN Figure ELECTRICAL CHARACTERISTICS RFANT5220110A0T Specification Working Frequency Range 2.4 GHz ～ 2.5GHz Gain 2 dBi (Typical) VSWR 2 max. Polarization Linear Azimuth Bandwidth Omni-directional Impedance 50Ω Rated Power (max.) 3 Watts Maximum Input Power 5 Watts for 5 minutes Operation Temperature -40 ̊C ~ +85 ̊C Remark: The specification is defined based on the test board dimension as in below Approval sheet Page 4 of 9 ASC_RFANT5220110A0T_V13 Sep. 2012 Antenna on Test Board ( FR4 Thickness 0.8mm) Antenna S11 on Test Board Bandwidth >150MHzBandwidth >150MHz Empty Area Empty Area 18x9 mm 50Ω ΩΩ ΩFeed line GROUND 30x18 mm 1mm 3.3mm 1.5mm WTC 2.5mm 18mm Empty Area Empty Area 18x9 mm 50Ω ΩΩ ΩFeed line GROUND 30x18 mm 1mm 3.3mm 1.5mm WTC 2.5mm 18mm Approval sheet Page 5 of 9 ASC_RFANT5220110A0T_V13 Sep. 2012 RADIATION PATTERN Radiation Pattern and Gain were dependent on measurement board design. The specification of RFANT5220110A0T antenna was measured based on the PCB size and installation position as shown in the below figure Test Board Vertical Horizontal Y - Z Plane Average Gain= -0.82 dBi Peak Gain = 1.69 dBi Average Gain =-3.22 dBi Peak Gain= -5.42 dBi Average Gain=-8.98 dBi X - Z Plane Average Gai n=-0.91 dBi Peak Gain= -5.97 dBi Average Gain=-3.24dBi Peak Gain= 2.66 dBi Average Gain= -8.61 dBi X - Y Plane Average Gain= -0.68 dBi Peak Gain= -5.97 dBi Average Gain=-3.12 dBi Peak Gain= 2.59 dBi Average Gain= -9.24 dBi Y Z WTC X Y Z WTC X Y Z WTC X Y Z WTC X Y Z WTC X Y Z WTC X z Y z Y z X z X X Y X Y Empty Area GROUND 30x18 mm WTC X Y Z Empty Area GROUND 30x18 mm WTC X Y Z X Y Z Approval sheet Page 6 of 9 ASC_RFANT5220110A0T_V13 Sep. 2012 RELIABILITY TEST Test item Test condition / Test method Specification Solderability JIS C 0050-4.6 JESD22-B102D *Solder bath temperature：235 ± 5°C *Immersion time：2 ± 0.5 sec *Solder：Sn3Ag0.5Cu for lead-free At least 95% of a surface of each terminal electrode must be covered by fresh solder. Leaching (Resistance to dissolution of metallization) IEC 60068-2-58 *Solder bath temperature：260 ± 5°C *Leaching immersion time：30 ± 0.5 sec *Solder : SN63A Loss of metallization on the edges of each electrode shall not exceed 25%. Resistance to soldering heat JIS C 0050-5.4 *Preheating temperature：120~150°C, 1 minute. *Solder temperature：270±5°C *Immersion time：10±1 sec *Solder：Sn3Ag0.5Cu for lead-free Measurement to be made after keeping at room temperature for 24±2 hrs No mechanical damage. Samples shall satisfy electrical specification after test. Loss of metallization on the edges of each electrode shall not exceed 25%. Drop Test JIS C 0044 *Height：75 cm *Test Surface：Rigid surface of concrete or steel. *Times：6 surfaces for each units；2 times for each side. No mechanical damage. Samples shall satisfy electrical specification after test. Adhesive Strength of Termination JIS C 0051- 7.4.3 *Pressurizing force： 5N(≦0603)；10N(>0603) *Test time：10±1 sec No remarkable damage or removal of the termination. Bending test JIS C 0051- 7.4.1 The middle part of substrate shall be pressurized by means of the pressurizing rod at a rate of about 1 mm/s per second until the deflection becomes 1mm/s and then pressure shall be maintained for 5±1 sec. Measurement to be made after keeping at room temperature for 24±2 hours No mechanical damage. Samples shall satisfy electrical specification after test. Approval sheet Page 7 of 9 ASC_RFANT5220110A0T_V13 Sep. 2012 Temperature cycle JIS C 0025 1. 30±3 minutes at -40°C±3°C, 2. 10~15 minutes at room temperature, 3. 30±3 minutes at +85°C±3°C, 4. 10~15 minutes at room temperature, Total 100 continuous cycles Measurement to be made after keeping at room temperature for 24±2 hrs No mechanical damage. Samples shall satisfy electrical specification after test. Vibration JIS C 0040 *Frequency：10Hz~55Hz~10Hz(1min) *Total amplitude：1.5mm *Test times：6hrs.(Two hrs each in three mutually perpendicular directions) No mechanical damage. Samples shall satisfy electrical specification after test. High temperature JIS C 0021 *Temperature：85°C±2°C *Test duration：10…

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1 Appendix RF Test Data for 2.4G WIFI Company: : Hangzhou Zhilegu Technology Co., Ltd. EUT : MIDI Devices FCC ID: : 2BWX2-FINGERSONIC Model Number : Fingersonic Keys Report No. : HTT202606685F02 Reviewed By : Heber He 2 1. Duty Cycle 1.1 Test Result 1.1.1 Ant1 Ant1 Mode TX Type Frequency (MHz) T_on (ms) Period (ms) Duty Cycle (%) Duty Cycle Correction Factor (dB) Max. DC Variation (%) 802.11b SISO 2412 8.417 8.937 94.18 0.26 0.04 2437 8.420 12.350 68.18 1.66 26.09 2462 8.416 9.020 93.30 0.30 0.91 802.11g SISO 2412 1.396 1.968 70.93 1.49 1.76 2437 1.396 1.922 72.63 1.39 0.03 2462 1.396 1.922 72.63 1.39 0.00 802.11n (HT20) SISO 2412 5.090 5.619 90.59 0.43 0.17 2437 5.090 5.616 90.63 0.43 0.00 2462 5.090 5.614 90.67 0.43 0.00 802.11n (HT40) SISO 2422 4.896 5.426 90.23 0.45 0.17 2437 4.896 5.421 90.32 0.44 0.03 2452 4.898 5.588 87.65 0.57 2.72 3 1.2 Test Graph 1.2.1 Ant1 802.11b_LCH_2412MHz_Ant1 (SISO)_NTNV 802.11b_MCH_2437MHz_Ant1 (SISO)_NTNV 4 802.11b_HCH_2462MHz_Ant1 (SISO)_NTNV 802.11g_LCH_2412MHz_Ant1 (SISO)_NTNV 5 802.11g_MCH_2437MHz_Ant1 (SISO)_NTNV 802.11g_HCH_2462MHz_Ant1 (SISO)_NTNV 6 802.11n(HT20)_LCH_2412MHz_Ant1 (SISO)_NTNV 802.11n(HT20)_MCH_2437MHz_Ant1 (SISO)_NTNV 7 802.11n(HT20)_HCH_2462MHz_Ant1 (SISO)_NTNV 802.11n(HT40)_LCH_2422MHz_Ant1 (SISO)_NTNV 8 802.11n(HT40)_MCH_2437MHz_Ant1 (SISO)_NTNV 802.11n(HT40)_HCH_2452MHz_Ant1 (SISO)_NTNV 9 2. Bandwidth 2.1 Test Result 2.1.1 OBW Mode TX Type Frequency (MHz) ANT 99% Occupied Bandwidth (MHz) Verdict Result Limit 802.11b SISO 2412 1 13.007 / Pass 2437 1 12.987 / Pass 2462 1 13.006 / Pass 802.11g SISO 2412 1 16.694 / Pass 2437 1 16.692 / Pass 2462 1 16.718 / Pass 802.11n (HT20) SISO 2412 1 17.900 / Pass 2437 1 17.905 / Pass 2462 1 17.905 / Pass 802.11n (HT40) SISO 2422 1 37.275 / Pass 2437 1 37.132 / Pass 2452 1 37.324 / Pass 2.1.2 6dB BW Mode TX Type Frequency (MHz) ANT 6dB Bandwidth (MHz) Verdict Result Limit 802.11b SISO 2412 1 9.168 >=0.5 Pass 2437 1 9.166 >=0.5 Pass 2462 1 9.172 >=0.5 Pass 802.11g SISO 2412 1 16.362 >=0.5 Pass 2437 1 16.358 >=0.5 Pass 2462 1 16.345 >=0.5 Pass 802.11n (HT20) SISO 2412 1 17.555 >=0.5 Pass 2437 1 17.547 >=0.5 Pass 2462 1 17.614 >=0.5 Pass 802.11n (HT40) SISO 2422 1 36.219 >=0.5 Pass 2437 1 36.440 >=0.5 Pass 2452 1 35.962 >=0.5 Pass 10 2.2 Test Graph 2.2.1 OBW 802.11b_LCH_2412MHz_Ant1 (SISO)_NTNV 802.11b_MCH_2437MHz_Ant1 (SISO)_NTNV 11 802.11b_HCH_2462MHz_Ant1 (SISO)_NTNV 802.11g_LCH_2412MHz_Ant1 (SISO)_NTNV 12 802.11g_MCH_2437MHz_Ant1 (SISO)_NTNV 802.11g_HCH_2462MHz_Ant1 (SISO)_NTNV 13 802.11n(HT20)_LCH_2412MHz_Ant1 (SISO)_NTNV 802.11n(HT20)_MCH_2437MHz_Ant1 (SISO)_NTNV 14 802.11n(HT20)_HCH_2462MHz_Ant1 (SISO)_NTNV 802.11n(HT40)_LCH_2422MHz_Ant1 (SISO)_NTNV 15 802.11n(HT40)_MCH_2437MHz_Ant1 (SISO)_NTNV 802.11n(HT40)_HCH_2452MHz_Ant1 (SISO)_NTNV 16 2.2.2 6dB BW 802.11b_LCH_2412MHz_Ant1 (SISO)_NTNV 802.11b_MCH_2437MHz_Ant1 (SISO)_NTNV 17 802.11b_HCH_2462MHz_Ant1 (SISO)_NTNV 802.11g_LCH_2412MHz_Ant1 (SISO)_NTNV 18 802.11g_MCH_2437MHz_Ant1 (SISO)_NTNV 802.11g_HCH_2462MHz_Ant1 (SISO)_NTNV 19 802.11n(HT20)_LCH_2412MHz_Ant1 (SISO)_NTNV 802.11n(HT20)_MCH_2437MHz_Ant1 (SISO)_NTNV 20 802.11n(HT20)_HCH_2462MHz_Ant1 (SISO)_NTNV 802.11n(HT40)_LCH_2422MHz_Ant1 (SISO)_NTNV 21 802.11n(HT40)_MCH_2437MHz_Ant1 (SISO)_NTNV 802.11n(HT40)_HCH_2452MHz_Ant1 (SISO)_NTNV 22 3. Maximum Conducted Output Power 3.1 Test Result 3.1.1 Power Mode TX Type Frequency (MHz) Maximum Peak Conducted Output Power (dBm) Verdict ANT1 Limit 802.11b SISO 2412 8.68 <=30 Pass 2437 8.72 <=30 Pass 2462 8.71 <=30 Pass 802.11g SISO 2412 8.46 <=30 Pass 2437 8.09 <=30 Pass 2462 8.05 <=30 Pass 802.11n (HT20) SISO 2412 8.32 <=30 Pass 2437 8.22 <=30 Pass 2462 8.02 <=30 Pass 802.11n (HT40) SISO 2422 8.05 <=30 Pass 2437 8.28 <=30 Pass 2452 8.12 <=30 Pass 23 4. Maximum Power Spectral Density 4.1 Test Result 4.1.1 PSD Mode TX Type Frequency (MHz) Maximum PSD (dBm) Verdict ANT1 Limit(dBm/3kHz) 802.11b SISO 2412 -4.03dBm/100kHz <=8 Pass 2437 -4.96dBm/100kHz <=8 Pass 2462 -5.04dBm/100kHz <=8 Pass 802.11g SISO 2412 -7.34dBm/100kHz <=8 Pass 2437 -7.42dBm/100kHz <=8 Pass 2462 -7.40dBm/100kHz <=8 Pass 802.11n (HT20) SISO 2412 -6.69dBm/100kHz <=8 Pass 2437 -7.02dBm/100kHz <=8 Pass 2462 -8.05dBm/100kHz <=8 Pass 802.11n (HT40) SISO 2422 -9.98dBm/100kHz <=8 Pass 2437 -10.00dBm/100kHz <=8 Pass 2452 -11.03dBm/100kHz <=8 Pass 24 4.2 Test Graph 4.2.1 PSD 802.11b_LCH_2412MHz_Ant1 (SISO)_NTNV 802.11b_MCH_2437MHz_Ant1 (SISO)_NTNV 25 802.11b_HCH_2462MHz_Ant1 (SISO)_NTNV 802.11g_LCH_2412MHz_Ant1 (SISO)_NTNV 26 802.11g_MCH_2437MHz_Ant1 (SISO)_NTNV 802.11g_HCH_2462MHz_Ant1 (SISO)_NTNV 27 802.11n(HT20)_LCH_2412MHz_Ant1 (SISO)_NTNV 802.11n(HT20)_MCH_2437MHz_Ant1 (SISO)_NTNV 28 802.11n(HT20)_HCH_2462MHz_Ant1 (SISO)_NTNV 802.11n(HT40)_LCH_2422MHz_Ant1 (SISO)_NTNV 29 802.11n(HT40)_MCH_2437MHz_Ant1 (SISO)_NTNV 802.11n(HT40)_HCH_2452MHz_Ant1 (SISO)_NTNV 30 5. Unwanted Emissions In Non-restricted Frequency Bands 5.1 Test Result 5.1.1 Ref Mode TX Type Frequency (MHz) ANT Level of Reference (dBm) 802.11b SISO 2412 1 -4.01 2437 1 -4.96 2462 1 -5.02 802.11g SISO 2412 1 -6.86 2437 1 -7.12 2462 1 -7.24 802.11n (HT20) SISO 2412 1 -7.91 2437 1 -7.72 2462 1 -7.75 802.11n (HT40) SISO 2422 1 -9.99 2437 1 -10.68 2452 1 -11.12 5.1.2 CSE Mode TX Type Frequency (MHz) ANT Level of Reference (dBm) Limit (dBm) Verdict 802.11b SISO 2412 1 -4.01 -24.01 Pass 2437 1 -4.96 -24.96 Pass 2462 1 -5.02 -25.02 Pass 802.11g SISO 2412 1 -6.86 -26.86 Pass 2437 1 -7.12 -27.12 Pass 2462 1 -7.24 -27.24 Pass 802.11n (HT20) SISO 2412 1 -7.91 -27.91 Pass 2437 1 -7.72 -27.72 Pass 2462 1 -7.75 -27.75 Pass 802.11n (HT40) SISO 2422 1 -9.99 -29.99 Pass 2437 1 -10.68 -30.68 Pass 2452 1 -11.12 -31.12 Pass 31 5.2 Test Graph 5.2.1 Ref 802.11b_LCH_2412MHz_Ant1 (SISO)_NTNV 802.11b_MCH_2437MHz_Ant1 (SISO)_NTNV 32 802.11b_HCH_2462MHz_Ant1 (SISO)_NTNV 802.11g_LCH_2412MHz_Ant1 (SISO)_NTNV 33 802.11g_MCH_2437MHz_Ant1 (SISO)_NTNV 802.11g_HCH_2462MHz_Ant1 (SISO)_NTNV 34 802.11n(HT20)_LCH_2412MHz_Ant1 (SISO)_NTNV 802.11n(HT20)_MCH_2437MHz_An…

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1 Appendix RF Test Data for BLE Company: : Hangzhou Zhilegu Technology Co., Ltd. EUT : MIDI Devices FCC ID: : 2BWX2-FINGERSONIC Model Number : Fingersonic Keys Report No. : HTT202606685F01 Reviewed By : Heber He 2 1. Duty Cycle 1.1 Test Result 1.1.1 Ant1 Ant1 Mode TX Type Frequency (MHz) T_on (ms) Period (ms) Duty Cycle (%) Duty Cycle Correction Factor (dB) Max. DC Variation (%) 1M SISO 2402 2.129 2.500 85.16 0.70 0.03 2440 2.128 2.500 85.12 0.70 0.03 2480 2.128 2.500 85.12 0.70 0.03 2M SISO 2402 1.076 2.500 43.04 3.66 0.03 2440 1.076 2.500 43.04 3.66 0.03 2480 1.076 2.500 43.04 3.66 0.03 3 1.2 Test Graph 1.2.1 Ant1 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV 4 1M_HCH_2480MHz_Ant1_NTNV 2M_LCH_2402MHz_Ant1_NTNV 5 2M_MCH_2440MHz_Ant1_NTNV 2M_HCH_2480MHz_Ant1_NTNV 6 2. Bandwidth 2.1 Test Result 2.1.1 OBW Mode TX Type Frequency (MHz) ANT 99% Occupied Bandwidth (MHz) Verdict Result Limit 1M SISO 2402 1 1.144 / Pass 2440 1 1.185 / Pass 2480 1 1.244 / Pass 2M SISO 2402 1 2.090 / Pass 2440 1 2.094 / Pass 2480 1 2.108 / Pass 2.1.2 6dB BW Mode TX Type Frequency (MHz) ANT 6dB Bandwidth (MHz) Verdict Result Limit 1M SISO 2402 1 0.722 >=0.5 Pass 2440 1 0.783 >=0.5 Pass 2480 1 0.744 >=0.5 Pass 2M SISO 2402 1 1.318 >=0.5 Pass 2440 1 1.269 >=0.5 Pass 2480 1 1.178 >=0.5 Pass 7 2.2 Test Graph 2.2.1 OBW 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV 8 1M_HCH_2480MHz_Ant1_NTNV 2M_LCH_2402MHz_Ant1_NTNV 9 2M_MCH_2440MHz_Ant1_NTNV 2M_HCH_2480MHz_Ant1_NTNV 10 2.2.2 6dB BW 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV 11 1M_HCH_2480MHz_Ant1_NTNV 2M_LCH_2402MHz_Ant1_NTNV 12 2M_MCH_2440MHz_Ant1_NTNV 2M_HCH_2480MHz_Ant1_NTNV 13 3. Maximum Conducted Output Power 3.1 Test Result 3.1.1 Power Mode TX Type Frequency (MHz) Maximum Peak Conducted Output Power (dBm) Verdict ANT1 Limit 1M SISO 2402 -0.39 <=30 Pass 2440 0.40 <=30 Pass 2480 0.68 <=30 Pass 2M SISO 2402 -0.30 <=30 Pass 2440 0.52 <=30 Pass 2480 0.86 <=30 Pass 14 4. Maximum Power Spectral Density 4.1 Test Result 4.1.1 PSD Mode TX Type Frequency (MHz) Maximum PSD (dBm) Verdict ANT1 Limit(dBm/3kHz) 1M SISO 2402 -0.47dBm/100kHz <=8 Pass 2440 0.22dBm/100kHz <=8 Pass 2480 0.50dBm/100kHz <=8 Pass 2M SISO 2402 -1.13dBm/100kHz <=8 Pass 2440 -0.19dBm/100kHz <=8 Pass 2480 0.20dBm/100kHz <=8 Pass 15 4.2 Test Graph 4.2.1 PSD 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV 16 1M_HCH_2480MHz_Ant1_NTNV 2M_LCH_2402MHz_Ant1_NTNV 17 2M_MCH_2440MHz_Ant1_NTNV 2M_HCH_2480MHz_Ant1_NTNV 18 5. Unwanted Emissions In Non-restricted Frequency Bands 5.1 Test Result 5.1.1 Ref Mode TX Type Frequency (MHz) ANT Level of Reference (dBm) 1M SISO 2402 1 -0.48 2440 1 0.26 2480 1 0.50 2M SISO 2402 1 -1.37 2440 1 -0.21 2480 1 0.27 5.1.2 CSE Mode TX Type Frequency (MHz) ANT Level of Reference (dBm) Limit (dBm) Verdict 1M SISO 2402 1 -0.48 -20.48 Pass 2440 1 0.26 -19.74 Pass 2480 1 0.50 -19.50 Pass 2M SISO 2402 1 -1.37 -21.37 Pass 2440 1 -0.21 -20.21 Pass 2480 1 0.27 -19.73 Pass 19 5.2 Test Graph 5.2.1 Ref 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV 20 1M_HCH_2480MHz_Ant1_NTNV 2M_LCH_2402MHz_Ant1_NTNV 21 2M_MCH_2440MHz_Ant1_NTNV 2M_HCH_2480MHz_Ant1_NTNV 22 5.2.2 CSE 1M_LCH_2402MHz_Ant1_NTNV 1M_LCH_2402MHz_Ant1_NTNV 23 1M_MCH_2440MHz_Ant1_NTNV 1M_HCH_2480MHz_Ant1_NTNV 24 1M_HCH_2480MHz_Ant1_NTNV 2M_LCH_2402MHz_Ant1_NTNV 25 2M_LCH_2402MHz_Ant1_NTNV 2M_MCH_2440MHz_Ant1_NTNV 26 2M_HCH_2480MHz_Ant1_NTNV 2M_HCH_2480MHz_Ant1_NTNV

Shenzhen HTT Technology Co., Ltd. Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China FCC PART 15 SUBPART C TEST REPORT FCC PART 15.247 Report Reference No. ...................: FCC ID. ......................................... : HTT202606685F01 2BWX2-FINGERSONIC Compiled by ( position+printed name+signature) : File administrators Heber He Supervised by ( position+printed name+signature) : Project Engineer Bruce Zhu Approved by ( position+printed name+signature) : RF Manager Kevin Yang Date of issue ...................................: Jun. 30, 2026 Testing Laboratory Name .............: Shenzhen HTT Technology Co.,Ltd. Address ..........................................: 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao’an District, Shenzhen, Guangdong, China Applicant’s name...........................: Hangzhou Zhilegu Technology Co., Ltd. Address ...........................................: Room 204, Building 8, Angel Village, Dream Town, Cangqian Subdistrict, Yuhang District, Hangzhou, Zhejiang Province, China Test specification ......................... : Standard ..........................................: FCC Part 15.247 Shenzhen HTT Technology Co.,Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen HTT Technology Co.,Ltd. is acknowledged as copyright owner and source of the material. Shenzhen HTT Technology Co.,Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Equipment description ................ : MIDI Devices Trade Mark ......................................: Fingersonic Manufacturer ...................................: Hangzhou Zhilegu Technology Co., Ltd. Model/Type reference .....................: Fingersonic Keys Listed Models ..................................: Fingersonic Guitar, Fingersonic Beats Modulation ......................................: GFSK Frequency ........................................ From 2402MHz to 2480MHz Ratings ............................................: DC 3.7V From Battery and DC 5V From External Circuit Result ..............................................: PASS Report No.: HTT202606685F01 Page 2 of 36 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China T E S T R E P O R T Equipment under Test : MIDI Devices Model /Type : Fingersonic Keys Listed Models : Fingersonic Guitar, Fingersonic Beats Model difference : The PCB board, circuit, structure and internal of these models are the same, Only model number is different for these model. Applicant : Hangzhou Zhilegu Technology Co., Ltd. Address : Room 204, Building 8, Angel Village, Dream Town, Cangqian Subdistrict, Yuhang District, Hangzhou, Zhejiang Province, China Manufacturer : Hangzhou Zhilegu Technology Co., Ltd. Address : Room 204, Building 8, Angel Village, Dream Town, Cangqian Subdistrict, Yuhang District, Hangzhou, Zhejiang Province, China Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: HTT202606685F01 Page 3 of 36 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Contents 1 TEST STANDARDS .......................................................................................................................................... 4 2 SUMMARY ........................................................................................................................................................ 5 2.1 General Remarks .................................................................................................................................... 5 2.2 Product Description ................................................................................................................................. 5 2.3 Equipment Under Test ........................................................................................…

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