Production : Power supply : 90-250V AC/5 -24 V DC Max. flow : 10A/Gang Wireless : Wi-Fi 2.4 GHz Security Mechanism : WEP/WPA-PSK/WPA2-PSK excavation Modes : inching/Interlock/Self-locking mode changeable Time for Inching Mode : 0.25-4s Power : 2200W/gang Functions : remote control ON/OFF : Turn electric devices on/off from anywhere App Support : unfreeze iOS and robot urban center App eWeLink Sync Status : period of time devices status provided to App Timing : Set schedule/countdown timers to turn on/off at such as time Scene : Turn on/off a gang of devices one tap ache Scene : Trigger on/off by temperature, humidity or strange situation conditions Voice Control : Works perfectly with Amazon Alexa DIN Rail Mounted : heavy for blue-collar assure 3 excavation Modes : Switch among interlock/self-locking/inching modes Independently Control : Control each gang separately -LRB- 4-gang -RRB- Welcome to visit the below link to get more user practice session : http://ewelink.coolkit.cc/?p=458 Package Included : SONOFF 4CH Pro Switch x 1 .