When it detects the slightest vibration, a loud alarm goes off. It has high to low adjustable sensitivity, allowing you to set it according to your needs.

• 130dB will startle the intruder and alert you of suspicious activities
• Parents also use this to keep their kids safe
• Prevent people with Dementia or Alzheimer’s from going where they're not supposed to go
• Simple and quick set up: No complex set up and wiring, the simple arm and disarm feature allows you to utilize one of two alarm modes
• Mode: 30 second alarm and continuous alarm
• Choose between sensitivity adjustment
• Use as home security, apartment security, in your bedroom, or while staying at a hotel
• Works on any type of doorknobs, including metal, French, standard, and plastic doorknobs
• Power: 9V DC (Battery supplied)
• Package also includes mounting accessories