Overview: This is a mini and compact DIY smart switch used for different kinds of switch boxes, even the smallest EU standard switch box. Convenient to automate your home appliances with eWeLink app through your smartphone or tablet or your voice command. Support to connect an external rocker light switch unable to automatically spring back for easily managing connected devices in your home, both on your phone or directly from the wall. It supports the DIY mode (designed for developers) which allows users to integrate MINI R2 into worldwide third-party open source smart home control system to achieve LAN control without cloud service, such as Home Assistant, openHAB, ioBroker, etc. Note: 1.The antenna has b electricity inside, do not break the wire jacket. 2.To make sure the stable RF signal, please keep the wire away from the metal component in the switch box when wiring. Specifications: Brand Name: SONOFF Input: AC 100-240V 50/60Hz 10A Max Output: AC 100-240V 50/60Hz 10A Max WiFi: IEEE 802.11 b/g/n 2.4GHz Material: PC V0 Size: 42.6*42.6*20mm Package List: Smart Switch (1/2//4/10PCS Optional)