Wide range motion detection: This PIR motion sensor with a 90-degree viewing angle of detects any moving object in the range of 6 m. The motion sensor alarm notifies you with LED illumination and loud sound that someone is approaching your home. Loud alarm: Set one of 8 chime ringtones and adjust volume of the wireless PIR motion sensor alarm to match your preferences. With max 85dB sound level, you'd be able to hear the home security alarm in any remote corner even during a loud party. Wireless: The home security system ensures continual signal exchange between the PIR motion sensor and the security alarm placed on a max 80 m distance. The wireless alarm would start as soon as the motion sensor alarm detects an activity. Easy to power: Use 6xAA batteries, not included, to power the low energy consuming LED motion detector. The home security alarm runs for a year on one set of batteries. The blue light would remind you to put new batteries inside the motion sensor. Discrete: This is a portable motion sensor alarm, due to its small size, battery power and wide range detection. The home security alarm with siren is hard to see among other devices, however, it ensures your home security 24/7., Weight: 0.28219169536 Pounds, Manufacturer: nedis