Notice: This is relay type, have no short circuit ,no overload protection,NO overcurrent protection.18mm Din Rail WIFI Smart Switch Remote control by eWeLink APP for Smart home.Remote control at anytime from anywhere.Timer ON/OFF.Scene setting:home scene(Turn on the light, turn on the water heater, turn on the TV, turn on the air conditioner,),going out scene(Turn off the lights, turn off the water heater, turn off the TV, turn off the air conditioner, etc.)Sharing devices with family and friends.18 mm Din Rail install.Instructions for use:Download "eWeLink " APPScan a QR code, or search "eWeLink" on APP store.Wi-Fi energy saving magnetic retention switch circuit breaker1. After the switched on, the indicator light is red, Press the key button until it becomes a green light and scintillating slowly flicker.2. Press the button for 5 seconds until the green light is converted from slow flash to fast flash, then turn on APP ( Fast Mode TOUCH ) and click on the next step of the mobile phone APP to find the device, registration, pairing success.Type:50A/32A/16AMaterial:ABScolour:WhitePackage Contents:1 x WiFi Circuit BreakerOnly the above package content, other products are not included.Note: Light shooting 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.