2A8VEMSA2Smart Alert dock is a device that provides data synchronization and charge current to Smart alert earplugs

Smart Alert Dock MSA 2 User Instructions Languages contained within the document with Language designation: EN User Instructions NO Brukerveiledning 2 FCC Unlicensed Devices Modification Statement: Changes or modifications to the equipment not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. Compliance Statement: This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interferences received, including interference that may cause undesired operation. Interference Statement: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. Exposure Statement: To comply with FCC/IC RF exposure limits for general population / uncontrolled exposure, the antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 com from any persons and must not be co-located or operating in conjunction with any other antenna or transmitter. 3 ISED Canada Compliance Statement This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada’s licence-exempt RSS. Operation is subject to the following two conditions: 1. This device may not cause interference. 2. This device must accept any interference, including interference that may cause undesired operation of the device. L’émetteur/récepteur exempt de licence contenu dans le présent appareil est conforme aux CNR d’Innovation, Sciences et Développement économique Canada applicables aux appareils radio exempts de licence. L’exploitation est autorisée aux deux conditions suivantes: 1. L’appareil ne doit pas produire de brouillage ; 2. L’appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d’en compromettre le fonctionnement. 4 B E F G A C H D Overview (Fig. 1) Dock Components (Reference Fig 1.0) AEarplug Station BEarplug LED CPower In DReset Port EDock LED FTop Panel GWall Mounting Holes HBottom Panel 5 E 12 Quick Start Guide Pairing Dock to WiFi E will blink in BLUE. With Dock LED (Fig 1-E) blinking BLUE (only) NOT BLUE & RED – in this case Dock was put into ‘Pairing Mode.’ 1. WiFi settings (on a mobile phone) 2. Select WiFi “Minuendo-Dock-XXX” where XXX corresponds to Dock serial number display on product label 3. Select SSID of WiFi Router for Dock to connect with 4. Enter Password of WiFi Router and press “Save” 5. When successful “Success” displayed on on the mobile. Dock LED = Solid GREEN Setting Dock to WiFi Pairing Mode RESET to PAIRING MODE if Blinking BLUE/RED. If Dock LED (Fig 1-E) showing blinking BLUE & RED Using suitable probe (such a pencil). Press and hold RESET pin for > 4 seconds. Release. Dock LED will blink BLUE when in WiFi Pairing Mode. Inserting and Removing Earplug 6 USER INSTRUCTION CONTENTS EN USER INSTRUCTIONS .................... 4 NO BRUKERVEILEDNING.................... 24 Introduction Minuendo Smart Alert dock (Dock) is an accessory item for use with the Smart Alert earplug (Earplug). It provides the function of a base station, simultaneously charging and performing data synchronisation for up to 8 Earplugs. Feature summary • Charging of Earplug(s) • Wall or desk mountable • Data synchronisation with Minuendo Smart Alert digital service (cloud) through WiFi • LED status indications for connected Earplugs and Dock Status • Single main power inlet. • Status reporting for automated ‘offline’ notifications (when registered to an active Cloud Account) • Automatic Firmware updates (when connected to server via WiFi). 7 Safety Information Please read and follow all safety information contained with these instructions before first use of the Smart Alert docks. Retain these instructions for future reference. Warning: • Ensure that mains power lead is connected to the Dock before connecting with the mains power socket. Ensure that the mains socket is off before connecting the mains power lead. • Do not remove the back panel while the Dock is connected to mains power. Do not rely on the mains socket on/off switch. Remove plug from socket. • Any repair or serving of the Dock should be performed by Authorised personnel only. • Ensure the Dock is mounted so that no foreign objects can fall into the Earplug stations. • Mount and use the Dock indoors only. • The Dock should not be used in environments that are considered flammable or explosive atmospheres. The Dock contains electrical components that may cause ignition. Do not use it in environments where sparks may cause fire or explosion. • The Dock should not be used where there is a risk that the Dock could impede an exit or escape route. • The Earplug should be fully dry before connecting with the Dock. • Do not place any object into the Earplug stations other than the Earplug. Caution: • When using the Dock on a desk, ensure that the mains power lead does not cause a trip hazard. • Ensure that the Dock is suitably secured to the wall or desk so that it cannot be knocked off. • Ensure that the mains power lead is regularly inspected for serviceability. • The Dock should not be used for more than 5 years from the date of manufacture stated on the packaging. • Do not remove Earplugs from the Dock by pulling on the Earplug cables • Do not remove the Earplug…

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Minuendo AS www.minuendo.com 1 of 1 November 30, 2022 To: Nemko North America, Inc. 303 River Road Ottawa, Ontario, Canada K1V 1H2 From: Minuendo AS Nedre Slottsgate 2C 0153 Oslo Norway AUTHORITY TO ACT AS AGENT - FCC On our behalf, I appoint Nemko Scandinavia, to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in FCC regulations will have affixed to it a label identical to that submitted for approval with this application. In signing this letter, Applicant certifies that neither the applicant nor any party to the application is not subject to a denial of Federal benefits, that include FCC benefits, pursuant to Section 5301 of the Anti- Drug Abuse Act of 1988, 21 U.S.C. § 862 because of a conviction for possession or distribution of a controlled substance. See 47 CFR 1.2002(b) for the definition of a "party" for these purposes. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for certification, as specified by Nemko North America Inc., still resides still resides with us. Sincerely, Printed name: Einar Mj. Brenne

Minuendo AS www.minuendo.com 1 of 1 November 30, 2022 To: Nemko North America, Inc. 303 River Road Ottawa, Ontario, Canada K1V 1H2 From: Minuendo AS Nedre Slottsgate 2C 0153 Oslo Norway AUTHORITY TO ACT AS AGENT - FCC On our behalf, I appoint Nemko Scandinavia, to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in FCC regulations will have affixed to it a label identical to that submitted for approval with this application. In signing this letter, Applicant certifies that neither the applicant nor any party to the application is not subject to a denial of Federal benefits, that include FCC benefits, pursuant to Section 5301 of the Anti- Drug Abuse Act of 1988, 21 U.S.C. § 862 because of a conviction for possession or distribution of a controlled substance. See 47 CFR 1.2002(b) for the definition of a "party" for these purposes. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for certification, as specified by Nemko North America Inc., still resides still resides with us. Sincerely, Printed name: Einar Mj. Brenne

Minuendo AS www.minuendo.com 1 of 2 November 30, 2022 To: Nemko North America, Inc. 303 River Road Ottawa, Ontario, Canada K1V 1H2 From: Minuendo AS Nedre Slottsgate 2C 0153 Oslo Norway REQUEST FOR CONFIDENTIALITY - FCC FCC ID: Pursuant to Sections 0.457(d) and 0.459 of the Commission’s Rules and FCC Guidance document 726920, we hereby request confidential treatment of information accompanying this application as outlined below: PERMANENT LONG-TERM CONFIDENTIALITY: Schematics Bill of Materials/Parts List Block Diagrams Theory of Operation SHORT TERM CONFIDENTIALITY FOR A PERIOD OF 90 DAYS Internal Photos External Photos User Manual Test Set-up Photographs When the device is marketed before the requested number of days listed above, the grantee will inform the TCB to release the Short-Term Confidentiality information withheld on the FCC equipment authorization website. The above information contains trade secrets and proprietary information not customarily released to the public. The public disclosure of this information might be harmful to the applicant and provide unjustified benefits to its competitors. The Applicant understands that pursuant to Rule 0.457(d)(1)(ii), disclosure of this Application and all accompanying materials will not be made before the date of the Grant for this Application. Sincerely, PROJECT NO / FILE NO Project No. or File code 2 of 2 Printed name: Einar Mj. Brenne Title: Production and logistics manager

OTA TEST REPORT Applicant Espressif Systems Product ESP ANT B Model ESP ANT B Report No. Y2209A0967-T1 Issue Date October 8, 2022 TA Technology (Shanghai) Co., Ltd. tested the above equipment in accordance with the requirements in ANSI/IEEE Std 149-2008. The test results show that the equipment tested is capable of demonstrating compliance with the requirements as documented in this report. Prepared by: Xu Ying Approved by: Xu Kai TA Technology (Shanghai) Co., Ltd. Building 3, No.145, Jintang Rd, Tangzhen Industry Park, Pudong Shanghai, China TEL: +86-021-50791141/2/3 FAX: +86-021-50791141/2/3-8000 OTA Test Report Report No: Y2209A0967-T1 TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 2 of 16 This report shall not be reproduced except in full, without the written approval of TA Technology (Shanghai) Co., Ltd. TABLE OF CONTENTS 1. General Information ....................................................................................................................... 3 1.1. Notes of the Test Report ................................................................................................... 3 1.2. Testing laboratory .............................................................................................................. 3 1.3. Laboratory Environment .................................................................................................... 3 2. General Description of Equipment under Test ............................................................................... 4 2.1. Applicant Information ......................................................................................................... 4 2.2. Manufacturer Information .................................................................................................. 4 2.3. Information of EUT ............................................................................................................ 4 2.4. Test Date ........................................................................................................................... 4 2.5. Applied Standards ............................................................................................................. 5 3. Test Conditions .............................................................................................................................. 6 3.1. Test Configuration ............................................................................................................. 6 3.2. Test Measurement ............................................................................................................. 6 4. Test Results ................................................................................................................................... 7 4.1. Gain and Efficiency ............................................................................................................ 7 4.2. Voltage Standing Wave Ratio (VSWR) .............................................................................. 8 4.3. Antenna S11 ...................................................................................................................... 9 5. Test Equipment List ..................................................................................................................... 10 AP PEN DIX A: 2-D Pattern Plots ............................................................................................................. 11 APPENDIX B: The EUT Appearance and Test Configuration ............................................................. 15 B.1 EUT Appearance ................................................................................................................. 15 B.2 Test Configuration .............................................................................................................. 16 OTA Test Report Report No: Y2209A0967-T1 TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 3 of 16 This report shall not be reproduced except in full, without the written approval of TA Technology (Shanghai) Co., Ltd. 1. General Information 1.1. Notes of the Test Report This report shall not be reproduced in full or partial, without the written approval of TA technology (shanghai) co., Ltd.The results documented in this report apply only to the tested sample, under the conditions and modes of operation as described herein .Measurement Uncertainties were not taken into account and are published for informational purposes only. This report is written to support regulatory compliance of the applicable standards stated above. This report must not be used by the client to claim product certification, approval, or endorsement by any government agencies. 1.2. Testing laboratory Company: TA Technology (Shanghai) Co., Ltd. Address: Building 3, No.145, Jintang Rd, Tangzhen Industry Park, Pudong Shanghai, China City: Shanghai Post code: 201201 Country: P. R. China Contact: Xu Kai Telephone: +86-021-50791141/2/3 Fax: +86-021-50791141/2/3-8000 Website: http://www.ta-shanghai.com E-mail: [email protected] 1.3. Laboratory Environment Temperature Min. =19°C，Max. = 25°C Relative humidity Min. =40%，Max. =72% Shield effect 0.7-6GHz > 100dB Ground resistance <0.5Ω OTA Test Report Report No: Y2209A0967-T1 TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 4 of 16 This report shall not be reproduced except in full, without the written approval of TA Technology (Shanghai) Co., Ltd. 2. General Description of Equipment under Test 2.1. Applicant Information Company: Espressif Systems Address: #101, Block 2, 690 Bibo Road, Zhang Jiang High-Tech Park, Shanghai, China 2.2. Manufacturer Information Company: Espressif Systems Address: #101, Block 2, 690 Bibo Road, Zhang Jiang High-Tech Park, Shanghai, China 2.3. Information of EUT General information EUT Description Product Name: ESP ANT B Model ESP ANT B HW Version: / SW Version: / Antenna Type: PCB Antenna Antenna Size 18mm *6.19mm *0.8mm Antenna Manufacturer: Espressif Systems Test Fre…

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FCC ID: 2A8VEMSA2 Device contains FCC ID: 2AC7Z-ESP32WROOM32E IC: 21098-ESPWROOM32E Made in Norway Smart Alert dock MSA2 DYYWWUID Minuendo-dock-XXXXXXX 2C:54:91:88:C9:E3 100-240V~,50/60Hz, 0.35A 5.0V ⎓ 0.12A per port HAPRO ELECTRONICS AS Minuendo AS Nedre Slottsgate 2 C 0153 Oslo, Norway Name: Model: S/N: WiFi SSID: MAC: Input rating Output rating: MFG: www.minuendo.com

FCC ID: 2A8VEMSA2 FCC 1.1307(b)(3)(i)(B) Determination of Exemption for Single RF Sources Average Output Power, Conducted398.11mW Average Output Power, Radiated871.60mW Separation Distance d (cm)(valid for d ≤40 cm) d (cm)20.00cm Frequency f (GHz) (valid for f≥300MHz and f≤6 GHz) f (GHz)2.46GHz ERP @20cm (mW)ERP 20cm 3060 value used in Threshold calculationx1.90 Threshold value at Separation distance d (mW)P th (mW)3060.00mW Verdict:EXEMPTED Values above are valid for Single Source RF transmitters Valid when available maximum time-averaged power or ERP is less than or equal to the Threshold Only valid for frequency ≥300MHz and ≤6GHz, not valid for other frequencies Valid for Separation Distance ≤40cm. Alternatively, use values in FCC 1.1307 Table 1. Threshold Value is 1 mW for separation distance less than 0.5cm

Bay Area Compliance Laboratories Corp. (Kunshan) Report No.: RSHD200218007-00A FCC Part 15.247 Page 16 of 84 FCC §1.1310 & §2.1091 –MAXIMUM PERMISSIBLE EXPOSURE (MPE) Applicable Standard According to subpart §2.1091 and subpart §1.1310, systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. Limits for Maximum Permissible Exposure (MPE) (§1.1310, §2.1091) (B) Limits for General Population/Uncontrolled Exposure Frequency Range (MHz) Electric Field Strength (V/m) Magnetic Field Strength (A/m) Power Density (mW/cm 2 ) Averaging Time (minutes) 0.3-1.34 614 1.63 *(100) 30 1.34-30 824/f 2.19/f *(180/f²) 30 30-300 27.5 0.073 0.2 30 300-1500 / / f/1500 30 1500-100,000 / / 1.0 30 f = frequency in MHz; * = Plane-wave equivalent power density; According to §1.1310 and §2.1091 RF exposure is calculated. Calculated Formulary: Predication of MPE limit at a given distance S = PG/4πR² = power density (in appropriate units, e.g. mW/cm 2 ); P = power input to the antenna (in appropriate units, e.g., mW); G = power gain of the antenna in the direction of interest relative to an isotropic radiator, the power gain factor, is normally numeric gain; R = distance to the center of radiation of the antenna (appropriate units, e.g., cm); Calculated Data: Mode Frequency Range (MHz) Antenna Gain Target Output Power Evaluation Distance (cm) Power Density (mW/cm 2 ) MPE Limit (mW/cm 2 ) (dBi) (numeric)(dBm)(mW) 802.11b 2412~2462 3.4 2.19 26.0 398.11 20 0.1734 1.0 802.11g 3.4 2.19 25.5 354.81 20 0.1546 1.0 802.11 n-HT20 3.4 2.19 25.5 354.81 20 0.1546 1.0 802.11 n-HT40 2422~2452 3.4 2.19 26.0 398.11 20 0.1734 1.0 BLE 2402~2480 3.4 2.19 8.0 6.31 20 0.0027 1.0 BT 2402~2480 3.4 2.19 10.0 10.0020 0.0044 1.0 Note: The target output power was declared by the manufacturer. Conclusion: The EUT meets exemption requirement- RF exposure evaluation greater than 20cm distance specified in § 2.1091. If the device built into a host as a portable usage, the additional RF exposure evaluation may be required as specified by§ 2.1093.

Nemko Group Nemko Scandinavia AS, Philip Pedersens vei 11, P.O. Box 91, 1366 Lysaker, Norway TEL +47 22 96 03 30 EMAIL [email protected] FCC ID 2A8VEMSA2 Report No. E22219.03 GenCode: 6 (Nemko template revision: 2021/10) Test Report Electromagnetic Compatibility Product Charger with WiFi Name and address of the applicant Minuendo AS Nedre Slottsgate 2C 0153 Oslo, Norway Name and address of the manufacturer Minuendo AS Nedre Slottsgate 2C 0153 Oslo, Norway Model MSA2 Rating 100-240V AC, 15W, 2.4GHz WLAN Trademark Minuendo Additional information FCC ID: 2A8VEMSA2 Tested according to FCC CFR 47 Subpart 15B ISED Canada ICES-003, Issue 7 Order number 456388 Tested in period 2022-04-22 - 2022-07-06 Issue date 20223-01-11 Name and address of the testing laboratory Nemko Scandinavia AS Philip Pedersens vei 11, 1366 Lysaker, Norway An accredited technical test executed under the Norwegian accreditation scheme Prepared by [Jan Gunnar Eriksen] Approved by [G.Suhanthakumar] FCC ID 2A8VEMSA2 Report No. E22219.03 Date: 2022-10-21 - Page 2 of 16 - REPORT REVISIONS Revision # Date Order # Description 00 2022-09-30 456388 First issued 01 2022-10-21 456388 Corrected Model name, included trademark and corrected voltage rating 02 2022-10-24 456388 Editorial generating new report number 03 2023-01-11 456388 Report covering new FCC ID for part 15B certification THIS REPORT APPLIES ONLY TO THE ITEM(S) AND CONFIGURATION(S) TESTED. It is the manufacturer's responsibility to assure the additional production units of this product are manufactured with identical electrical and mechanical components. The manufacturer is responsible to the authorities for any modifications made to the product, which result in non-compliance to the relevant regulations. Nemko authorizes the above named Customer to reproduce this report provided it is reproduced in its entirety. Any reproduction of parts of this report requires approval in writing from Nemko. Any use which a third party makes of this report, or any reliance on or decisions to be made based on it, are the responsibility of such third parties. Nemko accepts no responsibility for damages suffered by any third party as a result of decisions made or actions based on this report. Opinions expressed within this report regarding general assessments and qualifications for PASS or FAIL to the standards limits and requirements, are not part of the current accreditation. Neither is opinions expressed regarding model variants covered by the testing performed in this report. Deviations from, additions to, or exclusions from the test specifications are described in “Test Report Summary”. This report was originally distributed electronically with digital signatures. For more information contact Nemko. FCC ID 2A8VEMSA2 Report No. E22219.03 Date: 2022-10-21 - Page 3 of 16 - DESCRIPTION OF TESTED ITEM(S) Product description .................... : The product is a charger for up to eight noise cancellation headphones FCC ID Information ..................... : The product contains FCC ID 2AC7Z-ESP32WROOM32E Model/type ................................ : MSA2 Serial number ............................. : - Operating voltage ....................... : 100 – 240V AC 50/60 Hz Maximum power/current........... : 15 VA Insulation class ........................... : - Highest clock frequency ............. : 240 MHz Hardware version ....................... : - Software version ........................ : - Mounting position ...................... : ☒ Table top equipment ☒ Wall/ceiling mounted equipment ☐ Floor standing equipment ☐ Handheld equipment ☐ Rack mounted equipment ☐ Console equipment ☐ Other: RF CHARACTERISTICS OF THE TRANSMITTER Type .......................................... Wifi 2.4 GHz Frequency range......................... : 2400 – 2483.5 MHz Number of channels ................... : According to IEEE 802.11 standards and national regulations Channel BW ................................ : According to IEEE 802.11 standards Rated output power ................... : According to IEEE 802.11 standards Receiver category ....................... : According to IEEE 802.11 standards Classification .............................. : According to IEEE 802.11 standards Operating modes ........................ : According to IEEE 802.11 standards Types of modulation .................. : According to IEEE 802.11 standards Tunable bands ............................ : None User frequency adjustment ........ : None Antenna type .............................. : PCB Antenna gain .............................. : - Antenna connection ................... : PCB Number of antennas .................. : 1 Antenna diversity/MIMO ........... : None INPUT/OUTPUT PORTS Port name and description Cable Longer than 3m Attached during test Shielded AC mains 115V / 60 Hz ☐ ☒ ☐ Earpods in charging mode ☐ ☒ ☐ FCC ID 2A8VEMSA2 Report No. E22219.03 Date: 2022-10-21 - Page 4 of 16 - OPERATING MODES OP no. Description Applied for testing Emissions Immunity OP1 Charging of earpods ☒ ☐ FCC ID 2A8VEMSA2 Report No. E22219.03 Date: 2022-10-21 - Page 5 of 16 - PHOTOS AND DRAWINGS Copy of marking label ................. : Photo of the test item ................ : OTHER INFORMATION Modifications ............................. : None Additional information ............... : - Note: This equipment has been tested with certain cable types and cable configurations. Any changes to these parameters when installed may influence on the EMC properties of this equipment. FCC ID 2A8VEMSA2 Report No. E22219.03 Date: 2022-10-21 - Page 6 of 16 - TEST ENVIRONMENT Test laboratory ........................... : ☒ KJELLER (Instituttveien 6, N-2007 Kjeller, Norway) ☐ LYSAKER (Philip Pedersens vei 11, N-1366 Lysaker, Norway) Laboratory accreditation ............ : Norsk Akkreditering – TEST 033 P06 – Electromagnetic Compatibility Environmental conditions .......... : The climatic conditions during the tests are within limits specified by the manufacturer for t…

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FCC ID 2A8VEMSA2 Report No. FCC TEST SETUPS Test set-up for EMC emissions measurements Radiated emissions below 1 GHz FCC Radiated emissions below 1 GHz FCC ID 2A8VEMSA2 Report No. Radiated emission above 1 GHz Radiated emission above 1 GHz Conducted emissions mains AC