Specification Power Supply: 90~250V AC Rated frequency: 50HZ/60HZ Max current: 10A Max Power: 2200W Plug: 2 prong Chinese plug (type A ) Wireless Standard: Wi-Fi 2.4GHz b/g/n Security Mechanism: WEP/WPA-PSK/WPA2-PSK Overview Sonoff 4CH is an ESP8285 based 4 channel (4-gang) din rail mounting WiFi switch. Sonoff 4CH supports to connect and control 4 home appliances, which can be turned on/off separately by the buttons or iOS and Android APP EweLink. Owning a Sonoff 4CH means you have 4 Sonoff basic WiFi switches integrate together. The enclosure is din rail mount supported! A DIN rail is a metal rail of a standard type widely used for mounting circuit breakers and industrial control equipment inside equipment racks. These products are typically made from cold rolled carbon steel sheet with a zinc-plated or chromated bright surface finish. Sonoff 4CH belongs to Sonoff family, definitely, it bears all the functions basic Sonoff has. In EweLink, you can remote turn on/off from anywhere at any time, set single/repeat/countdown timing schedules to turn on/off at a specified time, share to others so that they can control together. Sonoff 4CH is hacker-friendly that you can flash your firmware without difficulty. Package include: 1 x Sonoff 4CH