Wireless 4 Channels ON/Off 220V Remote Control Switch Digital Remote Control Switch   4 Ways Remote Control Switch (Works 20 To 50 MTS) ON/OFF One Lamps/Fan 4 Ways Digital Telecontrol Switch, Wireless Remote Control Switch, Remote Controller Remote Control, Replace Original Wall Switch Directly, Radio Frequency, Anti-Interference, No Barrier Suitable For Home, Office, Hotel, Factory, Hospital, Restaurants, Meeting Rooms, Museum, Shop, and Art Gallery etc