The anti-theft alarm triggered by vibration, alert you by a 130 dB loud alarm to protect your loved ones if potential danger is near，and the device will send a notification to the user's mobile phone via wifi. Not only can mount this alarm on glass or sliding window/door, the vibration triggered alarm also suitable for wooden doors and windows, locker, painting, or any valuables you’d like to protect. Indoor use only. This home security device helps provide your home/store with extra protection.