QV3MYCC3AAUDIO(W2DIN,BT,LOW,EXP)

Issued by Document Name Date Version GS Park DS-MMCBT-SPE_200304-x 9/04/20 0.49 ⓒSoftware Development, R&D Center, DAESUNG ELTEC Page 1 / 11 Cover Issued by Document Name Date Version GS Park DS-MMCBT-SPE_200304-x 9/04/20 0.49 ⓒSoftware Development, R&D Center, DAESUNG ELTEC Page 2 / 11 I. Design Issued by Document Name Date Version GS Park DS-MMCBT-SPE_200304-x 9/04/20 0.49 ⓒSoftware Development, R&D Center, DAESUNG ELTEC Page 3 / 11 1 Operation Specification The explanation of the related key operation is shown as following: I．Short press: press the key,and release it within a time-period. II．Long press: press the key and hold it more than a time-period. III．Press: Independent of (I)(II),only a key operation. 2 RADIO 2.1 Channel change manually UP/DOWN 2.1.1 Operation key Head unit key NO. Key name operation reference 1 Short press <1.5 seconds 2 Short press <1.5 seconds 2.2 Channel change automatically UP/DOWN 2.2.1 Operation key Head unit key NO. Key name Operation reference 1 Long press >1.5 seconds 2 Long press >1.5 seconds 5 Short press <1.5 seconds 6 Long press >1.5 seconds 2.3 Band transition 2.3.1 Operation key Head unit key NO. Key name Operation Reference 1 RADIO Short press <1.5 seconds 2 RADIO Long press >1.5 seconds 2.3.2 Band transition ① When radio mode, press operation key(RADIO), it will change the band. At this time,return to the last received channel. ② In auto preset mode, band transition is shown as following. Issued by Document Name Date Version GS Park DS-MMCBT-SPE_200304-x 9/04/20 0.49 ⓒSoftware Development, R&D Center, DAESUNG ELTEC Page 4 / 11 2.4 Preset call 2.4.1 Operation key Head unit key NO. Key name Operation Reference 1 PRESET KEY-CH1/DISP Short press <1.5 seconds 2 PRESET KEY-CH2/PAGE Short press <1.5 seconds 3 PRESET KEY-CH3 Short press <1.5 seconds 4 PRESET KEY-CH4/RPT Short press <1.5 seconds 5 PRESET KEY-CH5/RDM Short press <1.5 seconds 6 PRESET KEY-CH6 Short press <1.5 seconds 2.4.2 Preset call ① When radio is in reception status, press operation key(CH1~CH6), transfer to the preset channel. 2.5 Preset memory 2.5.1 Operation key Head unit NO. Key name Operation Reference 1 PRESET KEY-CH1/DISP Long press >1.5 seconds 2 PRESET KEY-CH2/PAGE Long press >1.5 seconds 3 PRESET KEY-CH3 Long press >1.5 seconds 4 PRESET KEY-CH4/RPT Long press >1.5 seconds 5 PRESET KEY-CH5/RDM Long press >1.5 seconds 6 PRESET KEY-CH6 Long press >1.5 seconds 2.5.2 Preset memory ① When radio is in reception status, long press operation key(CH1~CH6), transfer to the preset channel. 2.6 Transition between Auto preset mode and Common mode 2.6.1 Operation key Head unit key NO. Key name Operation Reference 1 AUTO-P Long press >1.5 seconds 2 AUTO-P Short press <1.5 seconds 3 RADIO Short press <1.5 seconds Issued by Document Name Date Version GS Park DS-MMCBT-SPE_200304-x 9/04/20 0.49 ⓒSoftware Development, R&D Center, DAESUNG ELTEC Page 5 / 11 3 USB 3.1 USB source transition 3.1.1 Operation key Head unit key NO. Key name Operation Reference 1 MEDIA Short press <1.5 seconds 3.1.2 USB source transition ① When short press operation key (MEDIA), transfer to USB source. ② When USB device is not connected, it will display “NO DEVICE” 3.2 File select up/down 3.2.1 Operation key Head unit key NO. Key name Operation Reference 1 Short press <1.5 seconds 2 Short press <1.5 seconds 3.3 Fast forward/Rewind down 3.3.1 Operation key Head unit key NO. Key name Operation Reference 1 Long press >1.5 seconds 2 Long press >1.5 seconds 3.4 Repeat 3.4.1 Operating key Head unit key NO. Key name Operation Reference 1 4/RPT Short press <1.5 seconds 3.4.2 Repeat ① The repeat of the USB include single track repeat and the folder repeat. 3.4.3 One track repeat ① During the play, press operation key(4/RPT), transfer to one track repeat mode. 3.4.4 Releasing from one track repeat ① When one track repeat operation, one track repeat will release. 3.4.5 Folder repeat ① When one track repeat, press operation key(4/RPT) again. It will transfer to folder repeat. 3.4.6 Releasing from folder repeat Issued by Document Name Date Version GS Park DS-MMCBT-SPE_200304-x 9/04/20 0.49 ⓒSoftware Development, R&D Center, DAESUNG ELTEC Page 6 / 11 ① When folder repeat, press operation key(4/RPT) again. 3.5 Random 3.5.1 Operating key Head unit key NO. Key name Operation Reference 1 5/RDM Short press <1.5 seconds 3.5.2 One track random ① During the play, press operation key(5/RDM), play the random track, the figure is as following. 3.5.3 Releasing from random ① When set random, press operation key(5/RDM) again 3.6 Transfer to text display 3.6.1 Operation key Head unit key NO. Key name Operation Reference 1 1/DISP Short press <1.5 seconds 3.6.2 Transfer to text display ① When in USB source, press operation key(1/DSP), transfer to text display. ② The following content is changed in the order. 3.7 Text display page forward 3.7.1 Operation key Head unit key NO. Key name Operation Reference 1 2/PAGE Short press <1.5 seconds 3.7.2 Text display page forward ① If USB text, Track text are more than 10 characters, press operation key(2/PAGE), the next 10 characters are displayed. ② If USB text, Track text are less than 10 characters, press operation key(2/PAGE), it is invalid. ③ If reach the final character, press operation key(2/PAGE), return to the first page. Issued by Document Name Date Version GS Park DS-MMCBT-SPE_200304-x 9/04/20 0.49 ⓒSoftware Development, R&D Center, DAESUNG ELTEC Page 7 / 11 4 BT Audio 4.1 BT Audio source transition 4.1.1 Operation key Head unit key NO. Key name Operation Reference 1 MEDIA Short press <1.5 seconds 4.1.2 BT Audio source transition ① When short press operation key(MEDIA), transfer to BT Audio source. ② When BT Audio device is not connected, it will display “NO DEVICE” 4.2 File select up/down 4.2.1 Operation key Head unit key NO. Key name Operation Reference 1 Short press <1.5 seconds 2 Short press <1.5 seconds 5 BT Handsfree 5.1 BT Handsfree 5.1.1 Function ① Function to make a call with the device usin…

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Daesung Eltec Co., Ltd. 371-6 Gasan Dong Kumcheon Ku, Seoul, South Korea 153-023 Date: Dec 24, 2020 Timco Engineering, Inc. 849 N.W. State Road 45 P.O. Box 370 Newberry, Florida 32669 USA Letter of Authorization We, the undersigned, hereby authorize Geunki Son of DT&C Co., Ltd. to act on our behalf in all manners relating to application for equipment authorization for FCC ID: QV3MYCC3A including signing of all documents relating to these matters. Any and all acts carried out by Geunki Son of DT&C Co., Ltd. on our behalf shall have the same affect as acts of our own. This authorization is valid until further written notice from Daesung Eltec Co., Ltd. “I, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a).” Sincerely, Ju Hyung Lee Manager

Daesung Eltec Co., Ltd. 371-6 Gasan Dong Kumcheon Ku, Seoul, South Korea 153-023 Date: Dec 24, 2020 Timco Engineering, Inc. 849 N.W. State Road 45 P.O. Box 370 Newberry, Florida 32669 USA RE: Request of Confidentiality for FCC ID: QV3MYCC3A To Whom It may Concern: Pursuant to Sections 0.457 and 0.459 of the Commission`s Rules(CFR 47), and Section 552 (b) (4) of the Freedom of Information Act, Daesung Eltec Co., Ltd. hereby requests confidentiality and treatment of certain information accompanying this application. The materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these matters might be harmful to the Applicant and provide unjustified benefits to its competitors. We are also hereby request Short-Term Confidentiality for 180 days after the grant as outlined in Public Notice DA 04-1705. This provision will give Daesung Eltec Co., Ltd. temporary confidentiality of commercially sensitive information prior to product release. The requested permanent and Short-Term Confidential exhibits are listed as follows: PERMANENT & SHORT-TERM CONFIDENTIAL LIST Exhibit Description PERMANENT 1 Block Diagram 2 Schematics 3 Part Lists 4 Operation Description SHORT-TERM 5 Internal Photos 6 External Photos 7 Test-Setup Photos 8 User Manual The Applicant understands that pursuant to Rule 0.457, disclosure of this application and all accompanying documentations, where applicable, will not be public before the date of the Grant for this application. Sincerely, Ju Hyung Lee Manager

FCC ID : QV3MYCC3A Copyright Ⓒ 2021, DT&C Co., Ltd. View 1 FCC ID : QV3MYCC3A Copyright Ⓒ 2021, DT&C Co., Ltd. View 2 FCC ID : QV3MYCC3A Copyright Ⓒ 2021, DT&C Co., Ltd. View 3 FCC ID : QV3MYCC3A Copyright Ⓒ 2021, DT&C Co., Ltd. View 4 <Port>

FCC ID : QV3MYCC3A Copyright Ⓒ 2 021, DT&C Co., Ltd. SAMPLE LABEL & LOCATION LABELLING REQUIREMENTS The Label shown shall be permanently affixed at a conspicuous location on the device and be readily visible to the user at the time of purchase. -The package includes the device, battery, battery cover packed individually. This allows the users to identify where the FCC ID is located. <Label location> <Sample Label> -The FCC label shown is representative of the label that will appear on the radio when in production. Other information may also be included on this label.

FCC ID : QV3MYCC3A Copyright Ⓒ 2021, DT&C Co., Ltd. View 1 FCC ID : QV3MYCC3A Copyright Ⓒ 2021, DT&C Co., Ltd. View 2 FCC ID : QV3MYCC3A Copyright Ⓒ 2021, DT&C Co., Ltd. View 3 FCC ID : QV3MYCC3A Copyright Ⓒ 2021, DT&C Co., Ltd. View 4 <Module> FCC ID : QV3MYCC3A Copyright Ⓒ 2021, DT&C Co., Ltd. View 5 FCC ID : QV3MYCC3A Copyright Ⓒ 2021, DT&C Co., Ltd. View 6 < Antenna>

FCC ID: RF function or Mode Max Target Power (dBm) ANT Gain (dBi) Maximum EIRP (dBm) Maximum EIRP (mW) Maximum power density (mW/cm 2 ) Requriment (mW/cm 2 ) Bluetooth(1Mbps)2402.00~2480.005.000.005.003.1630.000631.000 Bluetooth(2,3Mbps)2402.00~2480.001.000.001.001.2590.000261.000 ~ ~ ~ ~ ~ ~ ▪ S = - Note = / ( 4 X 20 2 X π ) = mW/cm 2 Electric Field strength (V/m) Magnetic field strength (A/m) Power Density (mW/cm 2 ) Averageing time (minutes) 0.3~1.346141.63*10030 1.34~30824/f2.19 / f *180 / f 2 30 30~30027.50.0730.230 300~1,500f / 150030 1,500~100,0001.030 Conclusion : MPE Calculation ▪ Limits for Maximum Permissible Exposure (MPE) Frequency range (MHz) The exposure condition of this device is compliant with FCC EIRP / ( 4 R 2 π ) 3.163 S= Maximum power density(mW/cm 2 ) 0.00063 EIRP= Equivalent Isotropic Radiated Power(mW) R= Distance to the center of the radiation of the antenna(20cm) Frequency range (MHz) The EUT will only be used with a separation of 20 centimeters or greater between the antenna and the body of the user. The MPE sample calculation for this exposure is shown below. Note: Please refer to the operation description for Max tune-up power. QV3MYCC3A

Report No.: DRTFCC2101-0001 FCC ID: QV3MYCC3A TRF-RF-237(06)200603 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 2 / 76 Test Report Version Test Report No. Date Description Revised by Reviewed by DRTFCC2101-0001 Jan. 04, 2020 Initial issue InHee Bae JaeJin Lee Report No.: DRTFCC2101-0001 FCC ID: QV3MYCC3A TRF-RF-237(06)200603 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 3 / 76 Table of Contents 1. General Information ............................................................................................................... 4 1.1 Testing Laboratory .......................................................................................................................... 4 1.2 Testing Environment ....................................................................................................................... 4 1.3 Measurement Uncertainty ............................................................................................................... 4 1.4 Details of Applicant ......................................................................................................................... 5 1.5 Description of EUT .......................................................................................................................... 5 1.6 Declaration by the applicant / manufacturer ................................................................................. 5 1.7 Information about the FHSS characteristics ................................................................................. 6 1.8 Test Equipment List ......................................................................................................................... 7 1.9 Summary of Test Results ................................................................................................................ 8 1.10 Conclusion of worst-case and operation mode .......................................................................... 9 2. Maximum Peak Output Power Measurement .................................................................... 10 2.1 Test Setup ...................................................................................................................................... 10 2.2 Limit ................................................................................................................................................ 10 2.3 Test Procedure ............................................................................................................................... 10 2.4 Test Results ................................................................................................................................... 11 3. 20 dB BW .............................................................................................................................. 17 3.1 Test Setup ...................................................................................................................................... 17 3.2 Limit ................................................................................................................................................ 17 3.3 Test Procedure ............................................................................................................................... 17 3.4 Test Results ................................................................................................................................... 17 4. Carrier Frequency Separation ............................................................................................ 23 4.1 Test Setup ...................................................................................................................................... 23 4.2 Limit ................................................................................................................................................ 23 4.3 Procedure ....................................................................................................................................... 23 4.4 Test Results ................................................................................................................................... 23 5. Number of Hopping Frequencies ....................................................................................... 28 5.1 Test Setup ...................................................................................................................................... 28 5.2 Limit ................................................................................................................................................ 28 5.3 Procedure ....................................................................................................................................... 28 5.4 Test Results ................................................................................................................................... 28 6. Time of Occupancy (Dwell Time) ........................................................................................ 34 6.1 Test Setup ...................................................................................................................................... 34 6.2 Limit ................................................................................................................................................ 34 6.3 Test Procedure ............................................................................................................................... 34 6.4 Test Results ................................................................................................................................... 34 7. Transmitter Radiated Spurious Emissions and Conducted Spurious Emission .......... 39 7.1 Test Setup ...................................................................................................................................... 39 7.2 Limit ...........................…

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FCC ID : QV3MYCC3A Copyright Ⓒ 2021, DT&C Co., Ltd. Test Setup Photo of Radiated Measurement EUT Position: X-axis FCC ID : QV3MYCC3A Copyright Ⓒ 2021, DT&C Co., Ltd. Test Setup Photo of Radiated Measurement (0.009 ~ 30MHz) FCC ID : QV3MYCC3A Copyright Ⓒ 2021, DT&C Co., Ltd. Test Setup Photo of Radiated Measurement (below 1000MHz)) FCC ID : QV3MYCC3A Copyright Ⓒ 2021, DT&C Co., Ltd. Test Setup Photo of Radiated Measurement (Above 1GHz)