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1. Onboard ESP8266 WIFI module, there are two types of relays: 5V and 12V, please choose one of them;
2. The module has a working method:The mobile phone is directly mounted on the WIFI module, there is no limit to the number of connected mobile phones, and multiple mobile phones can be controlled;
3.  Transmission distance:In an open environment, when the mobile phone is mounted on the WIFI module, the maximum transmission distance is 80 meters;
4. The single load current of the neutral relay does not exceed 2A, and the single load current of the songle relay does not exceed 10A;