5 Modes Motion Detector Alarm: Not only serves as a motion detection alert, but also has other functions. Welcome / doorbell / alarm / colorful light / lighting pattern. Motion detectors are essential in a home security system. It can detect movement in the surrounding areas: driveways, porches, gates, houses, sheds, offices, driveways, swimming pools, shops, etc. And trigger an alert to the linked receiver. It provides an extra level of safety and security to your property and your loved ones. 5 languages / 36 ringtones / 4 brightness and color / 4 adjustable volume levels: 5 selectable welcome languages in welcome mode - 36 ringtones selectable in doorbell mode. The welcome / doorbell / alarm model has 4 adjustable volume levels. The color light mode is quiet and has 4 adjustable brightness levels, ideal for people with hearing impairments or baby sleepers in your home. The color light model also has 4 colors to choose from. Sensitive and wide wireless range: the alarm detects movement from a wide field of space, with a range of up to 280 m between receiver and motion detector. Infrared sensor detection range is around 4-8m to keep you informed and safe. You can put the motion detector on the porch, porch, mailbox and put the receiver in your house. Expandable Wireless Home Security: Flexible design according to your actual needs. You can choose the quantity of transmitter and receiver as you like, which can be freely matched, and set special lights or ringtones between them. Each receiver of this motion detector can work with up to 32 motion detectors. Easy to install and use: the device can be charged by micro USB or installed with batteries (infrared sensor requires three AAA batteries and the receiver requires three AA batteries) to operate. The infrared sensor and receiver have a mounting base. The infrared sensor can be rotated 360 degrees left to right and 180 degrees up and down. Easy to install and can rotate to any position you need.