Wedge the alarm under any inward-opening door. When someone tries to force the door open, pressure activates the alarm, emitting a 120dB sound.
Specification Working current: 10 Working voltage: 9 Scope of application: travel burglar alarm Model: Door Stopper Alarm Color: bare alarm (no battery) + white box, bare alarm (no battery) Volume ≥: 150 Material: ABS Size: 8 cm/5.5x1.77x1.5 inches Battery type: 1 X 9V battery (not included) Weight: 0.2kg