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LONG RELIABLE RANGE:Communication range of up to 150m/490ft (the distance from the sensors to the receiver In THE OPEN AIR) and Door chime triggered by PIR motion sensor that detection range about 2-8m/6-26ft to effectively keep you alerted of intruders or visitors.
DIFFERENT CHIME TONES:The receiver is a doorbell design with 32 different ringtones for personal preferences ,press “music”button to choose,4 levels volume adjustment((High/ Middle/Low/Mute) from 0-80dB,press receiver’s second button to set.