warmed Tips : This device lonesome support 2.4 G WIFI router and 2/3/4G floating network, it can not 5G router. Please do not the greatest load afoot of 10ASonoff switch lonesome use `` eWeLink '' autonomous app, others can not support.Production Description : Power supply : 90-250V ACSecurity Mechanism : WEP/WPA-PSK/WPA2-PSK Operating Temp : -20 degree ~ 70degree Material : RF-ABS Connector : Universal Functions : removed ON/OFF : Turn physical phenomenon devices on/off from anywhere App Support : Free IOS and humanoid floating App eWelink Sync Status : actual time device status provided to App Timing : Set scheduled/countdown timers to turn on/off at specified time Share Control : Control your shrewd home together with your family Scene : Turn on/off a gang of devices one tap shrewd Scene : Trigger on/off by temperature, humidity or different biology conditions Network Support : Control physical phenomenon devices over Wi-Fi or 2/3/4G floating network Voice Control : Works perfectly with Amazon Alexa How to install this device, please do as follow : 1. off electricity source 2. the covers at both ends 3. the two electricity source cables -LRB- live and Neutral -RRB- to the ports with `` IN '' mark, one cable for one port, and there 's no limitation for which port to connect 4. the two appliances cables -LRB- live and Neutral -RRB- to the two ports with `` OUT '' mark, one cable for one port, and there 's no limitation for which port to connect make the cover install firmly Welcome to visit the below link get more details of how to use it, please find `` SONOFF -LRB- RF -RRB- USER GUIDE '' : http://ewelink.coolkit.cc/?p=126 Package Included Sonoff x 4 Screw x 16 .