1. Wedge-shaped design to fit any hinged door. 2. Adjustable High Medium Low sensitivity. 3. No installation required, easy for travelers to carry. 4. 120db high pitched continuous siren when activated. 5. Can be used as a doorstop when power switch is turned off. 6. Special design for use at home, office, and hotel rooms. 7. Requires one 9V battery (not included) 8. Size approx: 14x4.5x3.2cm
