FCC ID: 2ACP4-BT250 Bluetooth Headset

User Manual Bluetooth Headset BT250 FCC ID:2ACP4BT250 Product Parameters Model Version Stand-by Time Power Input Noise Reduction Skip Function Product Application BT250 V4.1 180 180 hours DC5V/200mA CVC6.0 Support Use Distance Battery Capacity Talk Time Charging Time Protocol Voice Prompt 10 10 m 55mAH 4.5 4.5 hours 2 2 hours HFP HSP A2DP AVRCP APTX Support

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Caller report, line control answer/hang up/rejection/on-off, redial, volume adjustment, Chinese-English shifting, intelligent one-driving-

two, music pause/play, up and down song switching ipad Support any mobile phones with Bluetooth device, iPad and desktop computer. The desktop computer without Bluetooth function can be used by matching with the Bluetooth adapter. Pairing and Connection 1 1. Keep the distance between the mobile phone and the headset within 1 m; the closer, the better. 2 5 2. Press and hold the key for about 5 seconds, and then release it when the red and the blue lamps alternately blink. At this time, the headset has entered the paring mode. 3 BT250 3. Enable the Bluetooth function of the mobile phone, search the Bluetooth equipment, select BT250 sequence name for paring and connection. After connection is successful, the blue indicating lamp of the headset slowly blinks. Notes:

0000 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 iscompleted, the headset and the handset will remember eachother, without pairing 5 2 Key functions of line controller

(Vary with the brand, mode and system version of the mobile phone. The consumers shall make verification by themselves.)

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On/off: Press and hold the key for 5 seconds to turn on/off. Music or video pause: Press the key to pause playing, and press the key again to resume playback.

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Volume increase: Press and hold the key +; volume reduction: Press and hold the key -.

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Next song: press the key +; previous song: press the key -.

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Answer/hang-up: press the key to answer when the call is incoming, and press it again to hang up. 2 Rejection: Press and hold the key for about 2 seconds and then release it.

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Chinese-English voice shifting: Press and + at the same time. Setting method of intelligent one-driving-two Step I: pair and connect the first mobile phone 1. 5 1. In the off state of the Bluetooth headset, press and hold the multifunction key for about 5 seconds and enter into the pairing state when the red and blue headset indicating lamps alternately and quickly flash. 2. A BT250 2. Enable the Bluetooth function of the mobile phone A, search Bluetooth to find BT250 sequence name to pair and then connect. Step II: pair and connect the second mobile phone 1. A 1. Turn off the Bluetooth headset to disable the Bluetooth of the mobile phone A. 2. 5 2. In the off state of the Bluetooth headset, press and hold the multifunction key for about 5 seconds and enter into the pairing state when the red and blue headset indicating lamps alternately and quickly flash. 3. B BT250\

3. Enable the Bluetooth function of the mobile phone B, search Bluetooth to find BT250sequence name to pair and then connect. Step III: connect the first mobile phone with the headset again 1. A 1. Enable the Bluetooth function of the mobile phone A. 2.BT250 2. Find out the record of BT250 sequence namepreviously connected under the Bluetooth menu of the mobile phone, and then click Connect again. 3. A B 3. At this point, the mobile phone A and the mobile phone B are simultaneously connected to the Bluetooth headset. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions:

(1)thisdevicemaynotcauseharmfulinterference,and

(2) this device must accept any interference received, including interference that may cause undesiredoperation. Changes or modifications to this unit not expressly approved by the party responsible for compliancecouldvoidtheuser'sauthoritytooperatetheequipment.

Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the users authority to operate the equipment.

InternalPhotos OPEN VIEW OF EUT INTERNAL VIEW OF EUT-1 INTERNAL VIEW OF EUT-2 INTERNAL VIEW OF EUT-3 Antenna

InternalPhotos OPEN VIEW OF EUT INTERNAL VIEW OF EUT-1 Antenna INTERNAL VIEW OF EUT-2 INTERNAL VIEW OF EUT-3

ExternalPhotos 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)

ExternalPhotos 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 (LOCAL)-1 VIEW OF EUT (LOCAL)-2 VIEW OF EUT (PORT)

FCCIDLabelLocation Brand:SENTRY Model:BT250 FCC ID:2ACP4BT250

FCCIDLabelLocation Brand:SENTRY Model:BT250 FCC ID:2ACP4-BT250

Sentry Industries limited 507 Houston Center, 63 Mody Road, Tst, Hong Kong, China TEL: +852-23684777 FAX: +852-23684777 Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 9/15/2015 To whom it may concern:

We, the undersigned, hereby authorize Eurofins Product Service GmbH to act on our behalf in all matters relating to applications for equipment authorization FCC ID: 2ACP4BT250 including the signing of all documents related to these matters. Any and all acts carried out by Eurofins Product Service GmbH on our behalf shall have the same effect as acts of our own. We also hereby certify that no party to this application is subject to a denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. Sincerely, Signature Sentry Industries limited Contact person: Peetu Melwani Title: Manager

Sentry Industries limited 507 Houston Center, 63 Mody Road, Tst, Hong Kong, China TEL: +852-23684777 FAX: +852-23684777 Federal Communications Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 9/15/2015 Request for Confidentiality Company name: Sentry Industries limited FCC ID: 2ACP4BT250 FCC Part 15 Certification Gentlemen, In accordance with CFR 47 0.459, Sentry Industries limited hereby requests confidentiality of following attachments:

(1) schematic diagrams,

(2) detailed block diagrams,

(3) detailed operational descriptions,

(4) detailed parts list These documents contain detailed system and equipment description and related information about the product which Sentry Industries limited considers to be proprietary, confidential and a custom design and otherwise would not release to the general public. Since the design is a basis from which future technological products will evolve, Sentry Industries limited considers that this information would be of benefit to its competitors and that the disclosure of the information in these documents would give competitors an unfair advantage in the market. Sincerely, Signature

[Peetu Melwani]

[Manager]

Sentry Industries limited 507 Houston Center, 63 Mody Road, Tst, Hong Kong, China

Sentry Industries limited 507 Houston Center, 63 Mody Road, Tst, Hong Kong, China TEL: +852-23684777 FAX: +852-23684777 It is hereby declared that the product Model No.: BT250 FCC ID: 2ACP4BT250 Declaration concerning Antenna Specification fulfills the requirement in FCC test relating to the antenna type. The device specified above confirms to the FCC recommendations for internal antenna type described below:

Model No. of antenna: N/A Type of antenna:

Gain of the antenna: 0 dBi Frequency range:

PCB Antenna 2402-2480 MHz 507 Houston Center, 63 Mody Road, Tst, Hong Kong Hong Kong The mounting of the antenna is fixed to the radio module and no other antenna should be used. Company name: Sentry Industries limited Address:

City:

ZIP / Postal code:

Country:

Place:

Signature:

Date: Sep.15,2015 Shenzhen China

Sentry Industries limited 507 Houston Center, 63 Mody Road, Tst, Hong Kong,China TEL: +852-23684777 FAX: +852-23684777 Jun.16,2016 Federal Communication Commission Authorization and Evaluation Division FCC ID: 2ACP4-BT250 Re: Confidentiality Request Pursuant to Sections 0.457 and 0.459 of the Commissions Rules, the applicant hereby requests confidential treatment of information applied this application as outlined below:

1: Block Diagram 2: Circuit Diagram 3: Parts List 4.Operational Description The above 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. The Applicant understands that pursuant to Rules 0.457, disclosure of this Application and all accompanying documentation will not be made before the date of the Grant for this application. Sincerely, Sentry Industries limited Contact person: Peetu Melwani Title: Manager