This product is a wireless DIY WiFi switch or Tuya 4CH WiFi Switch module with 3 modes including Inching, Selfl-ocking and Interlock. It supports remote control by Tuya smart life App as well as voice control through Alexa, google home. You can DIY many smart home projects and it is widely use in lighting, electronic curtain, motor, etc. Supports WiFi network. Supports numerous WiFi smart switches on one smart phone. Supports status tracking: device status timely provided to the Tuya or Smart life. Supports remotely turn on or off connected appliances, for example light, electric kettle, electric rice cooker, electric curtain, access control, etc. Supports max 8 enabled scheduled or countdown or loop for each device. Voice Control: Compatible with "Amazon" Alexa, for Google Home. Name: WiFi Relay Module Input: 5v Micro-USB or DC 7-32V Output: 10A Max,4gang WIFI: IEEE 802.11 b or g 2.4GHz Colour: black Material: ABS Size: 74x74x18mm Package Contents: 1 x WiFi Relay Module Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.