2pcs Window Vibration Alarm Sensor 130dB Siren Ultra Slim Window Alarms Glass Break Security Alert Alarm Sensors Window Vibration Alarms Stick on for Home Office Caravans Dorm Shed Doors Windows RV

Good value for money easy to fit bought 6 so I feel more secure now. Quick delivery

These are good but basic. They take 3x LR44 batteries (included), have an on & off switch and a red LED. When turned on, the red LED flashes 5 times then the unit beeps once to arm. When triggered (turn on & tap them hard) its very loud. They are small, neat & thin. Can’t give it a 5 until I have had them longer to see how they do.

Really good product

Great assurance. Sleep better at night now. Make a loud noise indeed!

Two of these on separate windows keep going off,one on a window in the living room above a radiator and one in the bathroom above a radiator and as we are about 15 feet from the main road,I think it is the heat from the radiators setting them of as we also have them on both bedroom windows above radiators, but both also have secondary glazing and have never gone off.There is no lower sensitivity level on these either,they are either on or off so I think if you were cleaning your windows or opening and closing them,you would need to turn them off and hopefully don't forget to turn them on again.

Not convinced

Noise level alert,incase of intrudersEase to install great value for money. Fit for purpose.