1. [5 Modes available]Not only serves as a motion detector, but also has other functions: greeting, alarm, doorbell, colored light, night light mode, 5 in 1 automatic door chime. Color/ Red/ Blue/ Green, distinguish several entrances by different light colors. 2. [Adjustable melodies and volume]The receiver is a doorbell design with 36 ringtones and 5 doorbell sound greetings for personal preference. The volume is adjustable in 4 levels (loud/high/medium/low) from 113 to 25 dB. The colored light/lighting mode is quiet and has 4 adjustable brightness levels, ideal for the hearing impaired or babies sleeping in your home. The colored light model also has 4 selectable colors. 3. [Sensitive and wide wireless range]The motion sensor senses motion in a wide area, with a working range of up to 280m/918ft between the receiver and the motion sensor. The detection range of the infrared sensor is about 4-8m/13-26ft to keep you informed and . You can place the motion detector at the porch, porch and put the receiver in your house. 4. [Applications]Motion detectors are essential in a home security system. It can detect motion in the surrounding areas - front door, gallery, gate, walking paths, apartment, office, hotel, store, and many other indoor places. And trigger an alert to the connected receiver. It provides an additional level of security and to your property and loved ones.