Motion Detector Alarm w/ Chime INFRARED TECHNOLOGY - This detector uses infrared sensors to detect motion and trigger the loud 100 dB alarm (can select from either alarm or chime sound) WIDE COVERAGE - Sensors cover a wide area: 15 feet out from the unit, 60 degrees vertically and horizontally. EASY INSTALLATION W/ ADJUSTABLE MOUNT - Allows you to easily position/mount the device anywhere inside or outside the house, room, office, or garage. Adjustable swivel mount allows rotating of unit up to 270 degrees. PERFECT FOR INDOOR & OUTDOOR PROTECTION - Safely prevent young children, wandering elderly, or pets from passing through entrances and pathways. USES 9 VOLT BATTERY - Not included