XHT80281504SIDEWAYS TUMBLER

General Manager

[Title] General Manager May 03, 2015 To whom it may concern, Request for Permanent Confidentiality Under FCC Part 15 Certification FCC ID: XHT80281504 Request is hereby submitted by GUANG DONG YINRUN INDUSTRY CO., LTD to withhold permanently from public review certain portions of the application for equipment certification for the referenced FCC identifiers. This request for confidentiality is made pursuant to 47 CFR § 0.457(d) and 0.459 of the FCC Rules. In particular, the following sections of the application are to be kept permanently confidential and GUANG DONG YINRUN INDUSTRY CO.,LTD reserves the right to discern which parties can obtain access to these information: Schematics Detailed Block diagrams Detailed Operational/Functional Description The rationale for request for confidentiality is as followings: This information represents intellectual property of GUANG DONG YINRUN INDUSTRY CO., LTD and it is subject to competition. We have invested considerable time and materials in research and development to produce the referenced product. Disclosure of the permanently confidential portions of this application to competitors would not only give them significant competitive advantages in developing similar products, but would also disclose successful implementation of unpublished, leading edge technology developed by us. If you have questions or need further information, please contact the undersigned. Regards, [Signature] [Name] Cyrus Yang

External Photos

Label Artwork and Location FCC ID: XHT80281504 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. SIZE: 30mm (W) x 23mm (H)

Internal Photos

1 INTERTEK TESTING SERVICES Analysis Report The equipment under test (EUT) is a portable transmitter for a Sideways Tumbler operating at 27.145 MHz which is controlled by a crystal. The EUT is powered by one 9.0V 6F22 size battery. For more detail information pls. refer to the user manual. Antenna Type: Dedicated antenna Antenna Gain: 0dBi The nominal conducted output power specified: -24.0dBm (+/- 3dB) The nominal radiated output power (e.r.p) specified: -26.15dBm (+/- 3dB) Modulation Type: Pulse modulation According to the KDB 447498: T he worst-case peak radiated emission for the EUT is 70.5dBμV/m at 3m in the frequency 27.145MHz The EIRP = [(FS*D) ^2 / 30] mW= -24.73dBm The ERP = EIRP – 2.15 = -26.88 dBm which is within the production variation. The maximun conducted output power specified is -21dB m =0.008mW The source- based time-averaging conducted output power = 0.008* Duty Cycle mW < 0.1m W (Duty Cycle<100%) The SAR Exclusion Threshold Level for 27.145MHz when the minimum test separation distance is < 50mm: = 474 * [1 + log(100/f(MHz)]/2 = 371.2 mW Since the source-based time-averaging conducted output power is well below the SAR low threshold level, so the EUT is considered to comply with SAR requirement without testing. Transmitter Duty Cycle Calculation The duration of one cycle = 42.754ms Effective period of the cycle = 681.2μs x 8 + 2.0580ms x 8 = 21.9136ms DC = 21.9136ms / 42.754ms = 0.5126 or 51.26 % FCC ID: XHT80281504

Radiated Photos