KERUI Wireless Split Welcome Motion Sensor Alert Alarm System Doorbell Door Bell with Long Range Receiver and Transmitter Home or Office Security Protection for Front Doors Entryways Garages 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. VISUAL ALERTS:When infrared motion sensor detect any movement, the Receiver will make an audible sound & the LED light will flash;the LED light indicator flashes to perform a visual alter. Great visual indicator for you when listening to music or for the hearing impaired. EASY INSTALLATION:As for this visitor motion chime, there are no wires to run, no installation hassles, the sensor is wall mountable,before using,please read the manual carefully and put in batteries (not included),adjust the sensor's angle avoid false alarming,please note the package not included the remote control,just one receiver and one motion sensor(without batteries),if there are any questions, please contact us freely fuers.csc01@outlook.com WIDE APPLICATION:Use as a welcome doorbell chime at daytime and a burglar alarm system at night;can be used at doors,doorway,driveways,walking paths at your house,home, apartment, office, hotel, store and many other indoor places,not suitale for outdoor,the motion door chime alarm system without waterproof function.And the remote control need to buy by yourself from our shop as your need,thanks.