Radio call system with 6 transmitters (doorbells) and 1 receiver, Each transmitter functions as a channel and is suitable for outdoor use (protection value IP44), The receiver can be set with 36 melodies, Both the transmitters and the receiver can be provided with name cards, With a call, the LED of the relevant channel on the receiver will flash and the preset notification tone will be played through the speaker. The max. range is 200 meters indoors (under the most optimal conditions, in practice this will be less), The transmitters work on CR2032 button cell (these are included), the receiver works on 3x AA batteries (not included)