Easy InstallationMini wireless WiFi switch module with small size design. The receiver size is 47*42*23mm. It installs between the power supply and the appliance, which can be easily hidden in most electrical boxes or junction boxes, such as UK and EU wall switch boxes. or also use screws to fix on the board. You can easily install it to control the lights or socket. Timer FunctionTimer countdown function via APP or APP, automatically turn on/off your switches at certain times you set. Easily manage your schedule from your mobile phone. Quality AssuranceHigh quality relay can be used more than 400,000 times. This receiver adopts 10A relay, which can load high-power electrical appliances. The receiver is suitable for AC 85V~250V voltage, so AC 110V/220V/230V is OK. High Quality SwitchThe wireless switch can be clicked more than 500,000 times. 12V 27A battery is requested. And it can work for about 5 years. The battery can be replaced after disassembly. Multiple RF Wireless Switch ControlYou can add one RF wireless switch according to your demands. Each receiver can store about 10 RF wireless switches. And one RF wireless switch can also control multiple receivers. For example, 1 RF wireless switch installed on the wall beside the bedroom door and another one placed on the bedside table, both of them can control your bedroom light.