This is a ideal portable independent wireless security PIR motion sensor alarm system kit. Built in PIR motion sensor and it will activate the alarm if any movement is detected. Loud Alarm: Loud 105 db alarm, loud enough to remind you and alarm the intruders. When the alarm is triggered, it will sound for 30 seconds. High Sensitivity: High sensitivity detection, Through the detection of human radiation infrared heat and start the probe site sound alarm, in time to prevent theft. PIR detecting degree is up to 4-5m detect distance with 100° coverage, effectivily protect your home safety. With mount bracket, simple to install on any surface, battery operated, no wiring required. Wireless PIR motion detector alarm suitable for car, home, shopping malls, offices, courtyards and along the street stores and other places ideal anti-theft facilities. Is a modern family, shops, enterprises and institutions, travel to stay in the hotel must have anti-theft products.