★Reliable Range: The transmission range of sensor detects motion up to 280m/918ft and detection range of the infrared sensor approximately 2~8m/ 6.6~26ft to effectively keep you alerted. When the movement is detected by the sensor,the receiver will make an audible sound and the LED light will flash. ★5 Modes Selection: welcome, alarm, doorbell, colorful light and night light mode, 5 in 1 automatic door chime. You can set the proper mode according to your needs. With 4 colors LED light, Color/ Red/ Blue/ Green, and 4 levels adjustable brightness, can distinguish multiple entrances only by different light color. ★Different melodies & Volume for Selection：The receiver is a doorbell design with 36 ringtones and 5 welcome doorbell sound for personal preferences. 4 levels volume adjustable(Loud/ High/ Middle/ Low ) from 113~25dB. ★Wide Application: You can place the receiver in your house and put the the infrared motion sensor at other places, such as home mailbox, driveway, gallery, gate, doorway, walking paths, door entrance, apartment, office, hotel, store and many other indoor places, not suitale for outdoor; the motion sensor door chime without waterproof function. ★As for the receiver, no wiring needed, no installation hassles, self-adhesive installation, the detector is wall mounted. Use batteries or micro USB power supply. Before using, please read the manual carefully and put in batteries (not included), adjust the sensor's angle to avoid false alarming. If there are any question or problem, please contact us freely., Weight: 0.1543235834 pounds, Manufacturer: Waytronic