Xodus Innovations HS4320D Carlon Thomas and Betts Battery Powered Wireless Motion Sensor Security Alarm, White You can mount this alarm on wall or place anywhere in a room No wiring needed, great for travel 105 db. Siren sounds when motion in room is detected or when door/window is opened or 80 db. Chime, when chime is selected Detects motion up to 40 feet away within a 110 degree area 45-second exit and 15 second entry delays option Alarm operates on 3 AA batteries (not included). Low battery indicator You can mount this alarm on wall or place anywhere in a room No wiring needed, great for travel 105 db. Siren sounds when motion in room is detected or when door/window is opened or 80 db. Chime, when chime is selected Detects motion up to 40 feet away within a 110 degree area 30-second exit and 10 second entry delays option Alarm operates on 3 AA batteries (not included). Low battery indicator