EZVIZ T1 PIR (Passive Infrared Detector) sends movement notifications to your EZVIZ A1 Alarm Hub via RF signal, which in turn sends a push notification to your smartphone. Completely Wireless, no need to run cables around your home. Battery life of up to 2 years, powered by a CR123A battery. Wide Horizontal Visual Angle of 100 °, leaving no dead spots when installed in the corner of a room. Detection Range of 12x12m creates a large motion detection region. Support interacting with EZVIZ IP camera and siren via A1 Online deals are available for online purchases only and are not available for instore purchase. Prices are subject to change at anytime.