Sonoff SNZB-04 Instructions D'opération page 53

Hereby, Shenzhen Sonoff Technologies Co., Ltd. declares that the
radio equipment type SNZB-04 is in compliance with Directive
2014/53/EU.The full text of the EU declaration of conformity is
available at the following internet address:
https://www.sonoff.tech/usermanuals
TX Frequency:
ZigBee：2405-2480MHz
MAX PER：
2.21 （2405MHz） ，2.16 （2480MHz）
Shenzhen Sonoff Technologies Co., Ltd.
1001, BLDG8, Lianhua Industrial Park, shenzhen,
GD, China
ZIP code: 518000
MADE IN CHINA
Website: sonoff.tech