What's Dry Contact Switch Module: The dry contact module is a versatile electrical switch that responds to external signals, controlling other electrical equipment. With no need to worry about directions or polarity during installation, simply maintain the correct signal current and voltage levels. Why Choose Dry Contact Module: Compatible with mechanical reset switch and rocker switch, suitable for mounting boxes. Neutral wire is required. APP Remote Control: Turn on/off the devices effortlessly from anywhere after connecting the module to TuyaSmart/Smart Life APP. Convenient Voice Control: Use simple voice commands to trigger the dry contact through Alexa or Home Assistant to turn on/off the device effortlessly and more conveniently. Enjoy your smart life. Timer Schedule: With flexible timer settings, you can trigger connected devices while saving energy. Relay Status Function: With Relay Status Function, you don't have to worry about power outages as you can set on/off/remember the last status of the smart dry contact as relay status. Product Type: WiFi Smart Switch Module Relay: NO Max. Load: LED 300W, 10A Operation Temp.: -10 to +40°C Working Humidity: less than or equal to 90% WIFI Protocol: IEEE 802.11b/g Operation Frequency: 2.412GHz - 2.484GHz APP: TuyaSmart/Smart Life Voice: for Alexa/for Home Assistant Warm Tips: When using in access control systems or electronic control locks, you need to enable the "inching switch" function. Input Voltage: AC 85-265V Colour: White Material: ABS+PC Package Contents: 1 x Tuya Smart WiFi Dry Contact Switch Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm.