2ACP4LBT1814Bluetooth Headphones

BT920: ON-THE-NECK BLUETOOTH HEADPHONES Warnings and Precautions: • CAUTION: To prevent electric shock, use only compatible USB charging devices • WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. • CAUTION: Use of controls or adjustments or performance of procedures other than those specified may damage your device. • WARNING: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. • WARNING: Always store in a cool dry location. • WARNING: Headphones are capable of producing sound levels which can be harmful to your hearing. Do not listen at high volume for prolonged periods of time. Headphones may block out surrounding sounds. Never wear headphones while operating a vehicle. Use with caution. User assumes all risks associated with the use of this product. • WARNING: Don't over insert into ear canal. Discontinue use at the first sign of discomfort. Only use designed pads. Do not use dirty or damaged ear pads. Contains small parts that may present a choking hazard. Keep away from children. Important Safety Instructions: 1. Read these Instructions. 2. Keep these Instructions. 3. Heed all Warnings. 4. Follow all instructions. 5. Do not use this device near water. 6. Clean only with a dry cloth. 7. Do not block any ventilation openings. Use in accordance with the manufacturer's instructions. 8. Do not charge near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. 9. Discontinue use if damaged. 10. Protect the cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the device. 11. Only use attachments/accessories specified by the manufacturer. 12. Unplug this apparatus during lightning storms and when charging is complete. 13. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate or mally, or has been dropped. 14. Headphones are capable of producing sound levels which can be harmful to your hearing. Do not listen at high volume for prolonged periods of time. Headphones may block out surrounding sounds. Never wear headphones while operating a vehicle. Use with caution. User assumes all risks associated with the use of this product. BT920 On/Off: Press and hold the for 5 seconds to turn on/off. Music Pause: Press the button to pause playing, and press the again to resume playback. Volume Increase: Press and hold the button. Volume Reduction: Press and hold the button. Next Song: Press the button. Previous Song: Press the button. Answer/Hang-up: Press the button to answer when the call is incoming, and press it again to hang up. Rejection: Press and hold the button for about 2 seconds, then release it. • The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Sentry Industries Inc is under license. Other trademarks and trade names are those of their respective owners. 90-Day Warranty: Sentry warrants this product to be free from defects in materials and workmanship for 90-days from the date of original purchase. This warranty does not pertain to damage resulting from accident, abnormal use, misuse or neglect. Any defective product will be replaced if returned to an authorized Sentry dealer or to Sentry directly at: P.O. Box 885, One Bridge St. Hillburn, NY 10931. Please enclose a check for $5.00 for shipping & handling. ON-THE NECK WIRELESS EARPHONES Battery Charging: Before use, make sure battery is fully charged. 1. Find the micro USB slot located on the headphones in-line control 2. Plug Micro USB (small) end into the slot, plug the standard USB (large) end into a charging port or computer. 3. When charging is complete, unplug both ends. The headphones are ready for use. Pairing and Connection: *Before pairing, enable the Bluetooth function of the mobile phone.* 1. When pairing, keep the distance between the mobile phone and the headphones within 3.5 feet. 2. Press and hold the Power button for about 5 seconds, and then release it when the red and blue lights alternately blink. At this time, the headset has entered paring mode. 3. Enable the Bluetooth function of the mobile phone, search the Bluetooth equipment and select “BT920.” After connection is successful, the blue light of the headset will blink slowly. For additional information on pairing the earphones to a specific device please refer to your instructions or contact the manufacturer. Notes: • If the mobile phone prompts to enter the pairing password, please enter “0000" and confirm. • The pairing mode will be maintained for 5 minutes. If pairing and connection are unsuccessful beyond 2 minutes, the headset will automatically switch to the stand-by mode. • After pairing is complete, the headset and the handset will remember each other, without pairing. Key Functions: 1 . Microphone 2 . Device Pairing LED 3 . Volume up / Next Song Version: Bluetooth 5.0 Playtime: Up to 2 hours at 50% volume 4 . Multi Function 5 . Volume down / Last Song 6 . USB Charging Port 3 4 6 5 1 2 5 3 4 6 1 2 Sentry Industries inc declares that radio equipment BT920 is in compliance with Directive 2014/53/EU. The EU declaration of confirmity is available at https://sentryindustries.com/european-declaration-of-conformity/ Confirmity with Directives This product is CE marked to denote conformity with Directives 73/23/EEC (low voltage) and 89/336/EEC (Electromagnetic Compatibility) , as amended. Environmental Protection Waste electrical products should not be disposed of with household waste. Please recycle where facilities exist. Check with your Local Authority or retai…

Text truncated - open the document above for the full version.

Sentry Industries Limited July 23, 2020 Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Subject: Explanation of differences between product types FCC ID : 2ACP4LBT1814 Model Number: BT920, BT930, BT931, BT932, BT934 To Whom It May Concern: We, The Sentry Industries Limited hereby declare that the model : BT930, BT931, BT932, BT934 is identical with the model : BT920， except the model name. Except for the different above, no other modification is performed. Sincerely, Signature: Sentry Industries Limited Contact person: Peetu Melwani

Sentry Industries Limited Agent Authorization Company: Sentry Industries Limited Address: 507 Houston Center, 63 Mody Road, Tst, Hong Kong, China Product Name: Bluetooth Headphones Model Number(s): BT920, BT930, BT931, BT932, BT934 Product Description: Bluetooth Headphones We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: 2020-07-23 Name: Peetu Melwani Company: Sentry Industries Limited

Sentry Industries Limited Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2020-07-23 Subject; Request for Confidentiality FCC ID: 2ACP4LBT1814 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely Sentry Industries Limited Contact person: Peetu Melwani

External Photos TOP VIEW OF EUT BOTTOM VIEW OF EUT FRONT VIEW OF EUT BACK VIEW OF EUT LEFT VIEW OF EUT RIGHT VIEW OF EUT VIEW OF EUT(PORT)

FCC ID Label Location 5mm*20mm FCC ID: 2ACP4LBT1814

Internal Photos OPEN VIEW OF EUT INTERNAL VIEW-1 OF EUT Antenna INTERNAL VIEW-2 OF EUT INTERNAL VIEW-3 OF EUT

RF EXPOSURE EVALUATION 1. PRODUCT INFORMATION Product Description Bluetooth Headphones Model Name BT920, BT930, BT931, BT932, BT934 FCC ID 2ACP4LBT1814 2. EVALUATION METHOD According to 447498 D01 General RF Exposure Guidance v05 The 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ·[√f(GHz)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. Where f(GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation 3. CALCULATION P t =-7.754dBm=0.17mW The value of the Maximum output power P t is referred to the test report of the CFR47 §15.247. The result for RF exposure evaluation SAR=(0.17mW /5mm) .[√2.402(GHz)]= 0.05<3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. 4. CONCLUSION The SAR evaluation is not required.

Page 1 of 65 FCC Test Report Report No.: AGC08189200606FE03 FCC ID : 2ACP4LBT1814 APPLICATION PURPOSE : Original Equipment PRODUCT DESIGNATION : Bluetooth Headphones BRAND NAME : SENTRY MODEL NAME : BT920, BT930, BT931, BT932, BT934 APPLICANT : Sentry Industries Limited DATE OF ISSUE : Jul. 21, 2020 STANDARD(S) : FCC Part 15.247 REPORT VERSION : V1.0 Attestation of Global Compliance (Shenzhen) Co., Ltd CAUTION: This report shall not be reproduced except in full without the written permission of the test laboratory and shall not be quoted out of context. Report No.: AGC08189200606FE03 Page 2 of 65 REPORT REVISE RECORD Report Version Revise Time Issued Date Valid Version Notes V1.0 / Jul. 21, 2020 Valid Initial Release Report No.: AGC08189200606FE03 Page 3 of 65 TABLE OF CONTENTS 1. VERIFICATION OF CONFORMITY ............................................................................................................... 6 2. GENERAL INFORMATION ............................................................................................................................ 7 2.1. PRODUCT DESCRIPTION ................................................................................................................. 7 2.2. TABLE OF CARRIER FREQUENCYS ................................................................................................ 7 2.3. RECEIVER INPUT BANDWIDTH ....................................................................................................... 8 2.4. EXAMPLE OF A HOPPING SEQUENCY IN DATA MODE .................................................................. 8 2.5. EQUALLY AVERAGE USE OF FREQUENCIES AND BEHAVIOUR ................................................... 8 2.6. RELATED SUBMITTAL(S) / GRANT (S) ............................................................................................. 9 2.7. TEST METHODOLOGY ...................................................................................................................... 9 2.8. SPECIAL ACCESSORIES .................................................................................................................. 9 2.9. EQUIPMENT MODIFICATIONS .......................................................................................................... 9 3. MEASUREMENT UNCERTAINTY ............................................................................................................... 10 4. DESCRIPTION OF TEST MODES ............................................................................................................... 11 5. SYSTEM TEST CONFIGURATION ............................................................................................................. 12 5.1. CONFIGURATION OF EUT SYSTEM ............................................................................................... 12 5.2 EQUIPMENT USED IN TESTED SYSTEM ........................................................................................ 12 5.3. SUMMARY OF TEST RESULTS ....................................................................................................... 12 6. TEST FACILITY ........................................................................................................................................... 13 7. PEAK OUTPUT POWER ............................................................................................................................. 14 7.1. MEASUREMENT PROCEDURE ...................................................................................................... 14 7.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) ............................................................. 14 7.3. LIMITS AND MEASUREMENT RESULT ........................................................................................... 15 8. 20DB BANDWIDTH ..................................................................................................................................... 19 8.1. MEASUREMENT PROCEDURE ...................................................................................................... 19 8.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) ............................................................. 19 8.3. LIMITS AND MEASUREMENT RESULTS ........................................................................................ 20 9. CONDUCTED SPURIOUS EMISSION ........................................................................................................ 24 Report No.: AGC08189200606FE03 Page 4 of 65 9.1. MEASUREMENT PROCEDURE ...................................................................................................... 24 9.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) ............................................................. 24 9.3. MEASUREMENT EQUIPMENT USED ............................................................................................. 24 9.4. LIMITS AND MEASUREMENT RESULT ........................................................................................... 24 10. RADIATED EMISSION ............................................................................................................................... 35 10.1. MEASUREMENT PROCEDURE .................................................................................................... 35 10.2. TEST SETUP .................................................................................................................................. 37 10.3. LIMITS AND MEASUREMENT RESULT ......................................................................................... 38 10.4. TEST RESULT ................................................................................................................................ 38 11. NUMBER OF HOPPING FREQUENCY ..................................................................................................... 48 11.1. MEASUREMENT PROCEDURE ..................................................................................................... 48 11.2. TE…

Text truncated - open the document above for the full version.

Report No.: AGC08189200606FE03 Page 53 of 65 13. FREQUENCY SEPARATION 13.1. MEASUREMENT PROCEDURE The EUT shall have its hopping function enabled. Use the following spectrum analyzer settings: 1. Span: Wide enough to capture the peaks of two adjacent channels. 2. RBW: Start with the RBW set to approximately 30% of the channel spacing; adjust as necessary to best identify the center of each individual channel. 3. Video (or average) bandwidth (VBW) ≥ RBW. 4. Sweep: Auto. e) Detector function: Peak. f) Trace: Max hold. g) Allow the trace to stabilize. Use the marker-delta function to determine the separation between the peaks of the adjacent channels. 13.2. TEST SETUP (BLOCK DIAGRAM OF CONFIGURATION) Same as described in section 6.2 13.3. MEASUREMENT EQUIPMENT USED The same as described in section 6.3 13.4. LIMITS AND MEASUREMENT RESULT CHANNEL CHANNEL SEPARATION LIMIT RESULT MHz KHz Pass CH01-CH02 1.042 >= 2/3 20 dB BW TEST PLOT FOR FREQUENCY SEPARATION Note: The Low channel GFSK modulation is the worst case and recorded in the report. Report No.: AGC08189200606FE03 Page 54 of 65 14. FCC LINE CONDUCTED EMISSION TEST 14.1. LIMITS OF LINE CONDUCTED EMISSION TEST Frequency Maximum RF Line Voltage Q.P.( dBuV) Average( dBuV) 150kHz~500kHz 66-56 56-46 500kHz~5MHz 56 46 5MHz~30MHz 60 50 Note: 1. The lower limit shall apply at the transition frequency. 2. The limit decreases linearly with the logarithm of the frequency in the range 0.15 MHz to 0.50 MHz. 14.2. BLOCK DIAGRAM OF LINE CONDUCTED EMISSION TEST EUT & Support Units Report No.: AGC08189200606FE03 Page 55 of 65 14.3. PRELIMINARY PROCEDURE OF LINE CONDUCTED EMISSION TEST 1. The equipment was set up as per the test configuration to simulate typical actual usage per the user’s manual. When the EUT is a tabletop system, a wooden table with a height of 0.8 meters is used and is placed on the ground plane as per ANSI C63.10 (see Test Facility for the dimensions of the ground plane used). When the EUT is a floor-standing equipment, it is placed on the ground plane which has a 3-12 mm non-conductive covering to insulate the EUT from the ground plane. 2. Support equipment, if needed, was placed as per ANSI C63.10. 3. All I/O cables were positioned to simulate typical actual usage as per ANSI C63.10. 4. All support equipments received AC120V/60Hz power from a LISN, if any. 5. The EUT received DC 5V power from adapter which received AC120V/60Hz power from a LISN. 6. The test program was started. Emissions were measured on each current carrying line of the EUT using a spectrum Analyzer / Receiver connected to the LISN powering the EUT. The LISN has two monitoring points: Line 1 (Hot Side) and Line 2 (Neutral Side). Two scans were taken: one with Line 1 connected to Analyzer / Receiver and Line 2 connected to a 50 ohm load; the second scan had Line 1 connected to a 50 ohm load and Line 2 connected to the Analyzer / Receiver. 7. Analyzer / Receiver scanned from 150 kHz to 30MHz for emissions in each of the test modes. 8. During the above scans, the emissions were maximized by cable manipulation. 9. The test mode(s) were scanned during the preliminary test. Then, the EUT configuration and cable configuration of the above highest emission level were recorded for reference of final testing. 14.4. FINAL PROCEDURE OF LINE CONDUCTED EMISSION TEST 1. EUT and support equipment was set up on the test bench as per step 2 of the preliminary test. 2. A scan was taken on both power lines, Line 1 and Line 2, recording at least the six highest emissions. Emission frequency and amplitude were recorded into a computer in which correction factors were used to calculate the emission level and compare reading to the applicable limit. If EUT emission level was less –2dB to the A.V. limit in Peak mode, then the emission signal was re-checked using Q.P and Average detector. 3. The test data of the worst case condition(s) was reported on the Summary Data page. Report No.: AGC08189200606FE03 Page 56 of 65 14.5. TEST RESULT OF LINE CONDUCTED EMISSION TEST Line Conducted Emission Test Line 1-L Report No.: AGC08189200606FE03 Page 57 of 65 Line Conducted Emission Test Line 2-N RESULT: PASS Note: All the test modes had been tested, the mode 1 was the worst case. Only the data of the worst case would be record in this test report. Report No.: AGC08189200606FE03 Page 58 of 65 APPENDIX A: PHOTOGRAPHS OF TEST SETUP RADIATED EMISSION TEST SETUP BELOW 1GHZ RADIATED EMISSION TEST SETUP ABOVE 1GHZ Report No.: AGC08189200606FE03 Page 59 of 65 CONDUCTED EMISSION TEST SETUP Report No.: AGC08189200606FE03 Page 60 of 65 APPENDIX B: PHOTOGRAPHS OF EUT TOP VIEW OF EUT BOTTOM VIEW OF EUT Report No.: AGC08189200606FE03 Page 61 of 65 FRONT VIEW OF EUT BACK VIEW OF EUT Report No.: AGC08189200606FE03 Page 62 of 65 LEFT VIEW OF EUT RIGHT VIEW OF EUT Report No.: AGC08189200606FE03 Page 63 of 65 VIEW OF EUT(PORT) OPEN VIEW OF EUT Report No.: AGC08189200606FE03 Page 64 of 65 INTERNAL VIEW-1 OF EUT INTERNAL VIEW-2 OF EUT Antenna Report No.: AGC08189200606FE03 Page 65 of 65 INTERNAL VIEW-3 OF EUT ----END OF REPORT----

Test Setup Photos RADIATED EMISSION TEST SETUP BELOW 1GHZ RADIATED EMISSION TEST SETUP ABOVE 1GHZ