They may look like your average door stopper, but the safety device will actually set off an alarm when triggered, quickly alerting you if someone is tampering with your door. "If you stay in hotels a lot, or AirBnB's a lot, this is perfect," she said. "You place it underneath your door, but it's very sensitive. It has three levels of volume, and trust me this will wake up the deepest sleeper if anyone tries to get in your room
They may look like your average door stopper, but the safety device will actually set off an alarm when triggered, quickly alerting you if someone is tampering with your door. "If you stay in hotels a lot, or AirBnB's a lot, this is perfect," she said. "You place it underneath your door, but it's very sensitive. It has three levels of volume, and trust me this will wake up the deepest sleeper if anyone tries to get in your room