ITEM NAME:Self-locking Sonoff WiFi Wireless Smart Switch Timer DC 5V-12V Home Relay Module Product Description Description: SONOFF DC12V/5-32V Wireless WiFi Smart Switch Timer Module Inching/Self-Locking Remote Control Module Specification: Control mode: single way remote control switch Working voltage: AC:90 - 250V; DC:0 - 30V Transmission mode: wifi/ communication network Total load power: 2200W Telecontrol distance: Infinity Working frequency: 50HZ Support system: for Android/IOS Scope of application: entrance guard, switch, circuit break Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understand. Included: 1 x Switch Module.Transmission mode: wifi/ communication network. Scope of application: entrance guard, switch, circuit break. Included: 1 x Switch Module. Total load power: 2200W. If item is defective after 3 months, you can still send it back to us.