2ACK2-LS-4160B-Trek S4 bluetooth speaker

Federal Communications Commission (FCC) 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 interference received, including interference that may cause undesired operation. 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. Warning: Changes or modifications made to this device not expressly approved by Sentey, Inc. may void the FCC authorization to operate this device. Note: The manufacturer is not responsible for any radio or tv interference caused by unauthorized modifications to this equipment. Such modifications could void the user’s authority to operate the equipment.

Sentey, Inc. 11005 NW 33RD ST, Miami, FL 33172, USA DATE 07-23-2014 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2ACK2-LS-4160 Product Name: B-Trek S4 bluetooth speaker Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commissions rules, we hereby request that the following documents be held confidential: (List here the documents for which you are seeking confidentiality – for example ...) • Schematics • Block diagram • Operation description These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors. Dated this 07-23-2014 By: Eduardo Prieto Signature Printed Title: Product Manager On behalf of : Sentey, Inc. Telephone: +86-755-28026161

Sentey, Inc. 11005 NW 33RD ST, Miami, FL 33172, USA TEL: +1-305-597-3616 FAX: +1-786-456-1120 Series Models Description FCC ID: 2ACK2-LS-4160 Date: July 15, 2014 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 To whom it may concern: To whom concern: The device (Product Name: B-Trek S4 bluetooth speaker) Models Name: LS-4160,LS-4161,LS-4162,LS-4163,LS-4164,LS-4165 have same electrical, PCB and BOM, only the modelÿs name and color are different for marketing requirements. Sincerely, Eduardo Prieto /Product Manager only the modelÿs name and color are different for marketing requirements. are electrically identical

Sentey, Inc. 11005 NW 33RD ST, Miami, FL 33172, USA TEL: +1-305-597-3616 FAX: +1-786-456-1120 USB Port Statement FCC ID: 2ACK2-LS-4160 Date: July 15, 2014 To whom it may concern: We, the undersigned, state that the device's (Model: LS-4160, LS-4161, LS-4162, LS-4163, LS-4164, LS-4165) USB port only used for charge, no any data transfer to PC. Sincerely, Eduardo Prieto /Product Manager

FCC ID Label Information 1. Label location: 2. FCC ID Label: Sentey, Inc. B-Trek S4 bluetooth speaker Model: LS-4160 FCC ID: 2ACK2-LS-4160 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 interference received, including interference that may cause undesired operation.

RF Exposure evaluation According to KDB 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 The result is rounded to one decimal place for comparison eirp = pt x gt = (EXd) 2 /30 where: pt = transmitter output power in watts, gt = numeric gain of the transmitting antenna (unitless), E = electric field strength in V/m, --- 10 ((dBuV/m)/20) /10 6 d = measurement distance in meters (m)---3m So pt = (EXd) 2 /30 x gt Field strength = 73.09 dBuV/m @3m Ant gain 0dBi ;so Ant numeric gain=1 So pt={ [10 (73.09 /20) /10 6 x3] 2 /30x1 }x1000 mW = 0.006mW So ( 0.006mW/5mm)x √2.480GHz = 0.002 <3 Then SAR evaluation is not required

Shenzhen CTL Testing Technology Co., Ltd. Tel: +86-755-89486194 Fax: +86-755-26636041 FCC PART 15 SUBPART C TEST REPORT FCC Part 15.249 Report Reference No......................: CTL1407111596-WF Compiled by ( position+printed name+signature)..: File administrators Jacky Chen Name of the organization performing the tests ( position+printed name+signature)..: Test Engineer Tracy Qi Approved by ( position+printed name+signature)..: Manager Tracy Qi Date of issue.....................................: July 21, 2014 Test Firm..........................................: Shenzhen CTL Testing Technology Co., Ltd. Address.............................................: Floor 1-A, Baisha Technology Park, No. 3011, Shahexi Road, Nanshan, Shenzhen 518055 China. Applicant’s name............................: Sentey, Inc. Address.............................................: 11005 NW 33RD ST, Miami, FL 33172, USA Test specification: Standard ...........................................: FCC Part 15.249: Operation within the bands 920-928 MHz, 2400- 2483.5 MHz, 5725-5850 MHz and 24.0 - 24.25 GHz. TRF Originator ..................................: Shenzhen CTL Testing Technology Co., Ltd. Master TRF.......................................: Dated 2011-01 Shenzhen CTL Testing 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 CTL Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTL Testing 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 .................... : B-Trek S4 bluetooth speaker Trade Mark .......................................: Models/Type reference.....................: LS-4160, LS-4161, LS-4162, LS-4163, LS-4164, LS-4165 Modulation .......................................: FHSS Work Frequency...........................: 2402 MHz~2480 MHz Antenna Type..............................: internal FCC ID .............................................: 2ACK2-LS-4160 Result................................................: Positive V1.0 Page 2 of 33 Report No.: CTL1407111596-WF T E S T R E P O R T Test Report No. : CTL1407111596-WF July 21, 2014 ______________________________________________________________________________________________ Date of issue Equipment under Test : B-Trek S4 bluetooth speaker Model /Type : LS-4160 Listed Modes : LS-4161, LS-4162, LS-4163, LS-4164, LS-4165 Difference Description : Only the color and model's name is different. Applicant : Sentey, Inc. Address : 11005 NW 33RD ST, Miami, FL 33172, USA Manufacturer Dipro Electronics Co.,Ltd Address 4F, No.42, Fuwei West Street, Xiashiwei Village, Fuyong Town,Bao’an District, Shenzhen China Test Result according to the standards on page 4: Positive 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. V1.0 Page 3 of 33 Report No.: CTL1407111596-WF Contents 1. TEST STANDARDS .................................................................. 4 2. SUMMARY............................................................................. 5 2.1. General Remarks 5 2.2. Equipment Under Test 5 2.3. Short description of the Equipment under Test (EUT) 5 2.4. EUT operation mode 6 2.5. EUT configuration 6 2.6. Related Submittal(s) / Grant (s) 6 2.7. Modifications 6 3. TEST ENVIRONMENT............................................................... 7 3.1. Address of the test laboratory 7 3.2. Test Facility 7 3.3. Environmental conditions 7 3.4. Configuration of Tested System 7 3.5. Statement of the measurement uncertainty 8 3.6. Equipments Used during the Test 9 4. TEST CONDITIONS AND RESULTS ............................................ 10 4.1. Conducted Emissions Test 10 4.2. Radiated Emission Test 13 4.3. Band Edge Measurement 18 4.4. Occupied Bandwidth Measurement 22 5. ANTENNA REQUIREMENT ....................................................... 24 6. TEST SETUP PHOTOS OF THE EUT .......................................... 25 7. EXTERNAL AND INTERNAL PHOTOS OF THE EUT ....................... 28 V1.0 Page 4 of 33 Report No.: CTL1407111596-WF 1. TEST STANDARDS The tests were performed according to following standards: FCC Rules Part 15.249: Operation within the bands 902 - 928 MHz, 2400 - 2483.5 MHz, 5725 - 5875 MHz, and 24.0 - 24.25 GHz. ANSI C63.4-2009 V1.0 Page 5 of 33 Report No.: CTL1407111596-WF 2. SUMMARY 2.1. General Remarks Date of receipt of test sample : July 11, 2014 Testing commenced on : July 11, 2014 Testing concluded on : July 21, 2014 2.2. Equipment Under Test Power supply system utilised Power supply voltage : o 120V / 60 Hz o 115V / 60Hz o 12 V DC o 24 V DC ● Other (specified in blank below) DC 3.7V from battery 2.3. Short description of the Equipment under Test (EUT) The EUT is a B-Trek S4 bluetooth speaker work at 2402~2480 MHz. Channel List: Channel Frequency (MHz) Channel Frequency (MHz) Channel Frequency (MHz) 00 2402 27 2429 54 2456 01 2403 28 2430 55 2457 02 2404 29 2431 56 2458 03 2405 30 2432 57 2459 04 2406 31 2433 58 2460 05 2407 32 2434 59 2461 06 2408 33 2435 60 2462 07 2409 34 2436 61 2463 08 2410 35 2437 62 2464 09 2411 36 2438 63 2465 10 2412 37 2439 64 2466 11 2413 38 2440 65 2467 12 2414 39 2441 66 2468 13 2415 40 2442 67 2469 14 2416 41 2443 68 2470 15 2417 42 2444 69 2471 16 2418 43 2445 70 2472 17 2419 44 2446 71 2473 18 2420 45 2447 72 2474 19 2421 46 2448 73 2475 20 2422 47 2449 74 2476 21 2423 48 2450 75 2477 22 2424 49 2451 76 2478 23 2425 50 2452 77 2479 24 2426 51 2453 78 2480 25 2427 52 2454 26 2428 53 2455 Modulation: 1Mbps(GFSK), 2Mbps(Pi/4 DQPSK), 3Mbps(8DPSK) For more details, refer to the user’s manual of the EUT. Serial number: Prototype V1.0 Page 6 of 33 Report No.: CTL1407111596-WF 2.…

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