Selling Point Note:Please make sure to select the right model before buying,or leave us a message before shipping. Features: Cutover current: 10A Voltage: DC 7-32V/85-250V(optional) Working Temperature: -20 to 70degree Working Humidity: 40% to 80% RH Product Selling: 1.Supports WiFi network,remotely turn on or off connected appliance/light; 2.Supports status tracking: device status timely provided to the "EWeLink"; 3.Supports max 8 enabled scheduled/countdown/loop timers for each device; 4.Supports numerous WiFi smart switches on one smart phone; 5.Works with Amazon Echo, Echo Dot, Amazon Tap; 6.Works with Google Home and Google Nest. Function: Inching mode : Switch on channel 1 , channel 1 will be automatically closed after 0.7 seconds . Channel 2 is same to the channel 1 . Self-locking : like normal 2 channle switch , each channel could be switched on/off seperately . Inter lock : Switch on any 1 channel , other channels will be switched off automatically . Note: remote battery CR2032 (Not include) Wiring Diagram Note: We have added a USB5v port to the device, just for testing purposes, we do not recommend using it. If the buyer wants to use the USB5v input, they need to remove the shell to use it. I have attached a comparison picture. We will delete this USB5V port in subsequent versions, sorry for the inconvenience caused.