SABRE Motion Sensor Alarm (3 Pack) Alarm Sounds Very Loudly when Motion is Detected Impressive Coverage Area - 120 Degree Wide Angle Detection and 20 Foot / 6 Meter Range Alarm has a Low Battery Indicator and Panic Feature Installs in Minutes - Mounting Bracket Included Requires 3xAAA Batteries Alarm has a Low Battery Indicator and Panic Feature Installs in Minutes - Mounting Bracket Included Requires 3xAAA Batteries Chime Mode - Alerts when People Come / Go Alarm Mode - Helps Scare Off Intruders to Secure your Belongings when Motion is Detected