Practical set SH4-99566 with three mini radio-controlled socket sets for indoors and remote control Thanks to these modern radio-controlled socket outlets, which can be conveniently controlled with the enclosed matching remote control, lights or appliances up to 3,000 watts each can be conveniently switched on and off in the house. To do this, simply place the radio adapter plugs in the indoor sockets and connect the electrical devices or lights as usual. The remote control can now be used to switch the device supplied via a socket - or also the devices connected to all three sockets together. Remote control battery: 1 x A23S Radio frequency: 433.92 MHz Radio range: 30 m