XEY-ZX-RNZX Root Node

Federal Communications Commission Authorization and Evaluation Division Permanent Confidentiality Request regarding application for certification of FCC ID: XEY-ZX-RN Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request permanent confidential treatment of information accompanying this application as outlined below: Exhibit Type Block diagram, Schematics, Operational Description The above materials contain trade secrets and proprietary information not customarily released to the public, the public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Sincerely, Jianan Cao

ZX Root Node External Photos:

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ZX Root Node Internal Photos:

© TÜV SÜD Canada Inc. This test report shall not be reproduced except in full, without written approval of TÜV SÜD Canada Inc. April 23, 2020 FCC-XEY-ZX-RN_RF_Exposure Exhibit: RF Exposure – FCC FCC ID: XEY-ZX-RN IC: 8410A-ZXRN © TÜV SÜD Canada Inc. This test report shall not be reproduced except in full, without written approval of TÜV SÜD Canada Inc. April 23, 2020 FCC-XEY-ZX-RN_RF_Exposure 1 Product ZX Root Node Thermostat Verdant Environmental Technologies Inc Client Standard(s) FCC Part 15 Subpart 15.247:2016 FCC KDB 447498:2015 SAR Calculations: 902.8 – 927.7 MHz FHSS transmitter The EUT contains a 902 – 928 MHz FHSS transmitters. The firmware guarantees simultaneous operation will not occur and therefore antenna co-location testing is not applicable. This device is designed to be operated handheld and for the purpose of demonstrating compliance with MPE requirements and SAR exemption; we present for a worst case 5mm distance and 100 % duty cycle. FCC Requirements: SAR test exclusion guidance As per FCC KDB 447498 D01 Section 4.3.1 a), the 1-g extremity SAR Test Exclusion Threshold for 100 MHz to 6 GHz at test separation distances ≤ 50 mm is determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] [√f(GHz)] ≤ 3.0 Performing the calculation, of the worst case mentioned above, using the maximum power measured of 12.3mW (see page 26 on 7169005571C-000_ZX_Root_Node_900MHz-FHSS Rev2.pdf) yields to: 12.3 5 ∙ √ 0.927525=2.34, 2.34 is below the 3.0 worst case limit, so this device complies with FCC requirements ISED Requirements: SAR test exclusion guidance As per Table 1 in RSS-102, Section 2.5.1 at 1900MHz is 7mW at 5mm or less. This device has effective isotropic radiated power (as worst-case vertical polarization at 915MHz, see, for instance pag.42 in 7169005571C-000_ZX_Root_Node_900MHz-FHSS Rev2) with a peak value of 98 (dBμV/m @ 3 meters) - 95.2 (factor to convert to EIRP at 3 meters) of 2.8dBm, or 3mW. • 3mW is less than 7mW limit as per section 2.5.1 on RS-102, thus the device meets the exception rules.