BOYING A101 Wireless Door Bell
Simple and stylish appearance，made by new ABS material,no harm to the human body.
Beautiful Tunes & Sound - Select from 36 tunes! From the usual "ding dong" to any one of several well-known and fun melodies, with 4 adjustable volume settings.
Remote control distance of up to 280M/900Feet. Use radio frequency transmitter technology and have ten million group coding, effectively avoid outside interference.
Energy saving, maximum power is only 2W. Standby power consumption 0.5W.
Transmitter waterproof design, do not worry about rain.