Specifications: 1. The New Door Magnetic Induction Alarm, High-decibel Vibration Induction Anti-theft Alarm, Suitable For Various Scenarios Such As Home, Hotel, And Company. 2. The Alarm Is Easy To Install, No Tools Are Needed, Just Tear Off The Protective Film And On The Door Or Window, Which Is Convenient And Quick To Use. 3. Turn On The Switch, The Indicator Light Will Flash, And It Will Start Working After 5 Seconds, When The Product Detects Vibration, It Will Emit A 125db Alarm Sound, And The Red Warning Light Will Flash, Protecting Your Property From Being Stolen By Thieves. 4. The Alarm Has A Long Battery Life, Low Energy Consumption, And Can Stand By For About A Year. When The Alarm Is Too Low, There Will Be A Low Battery Reminder And The Red Light Will Flash. 5. The Alarm Is Light And Compact, Does Not Take Up Space, Is Easy To Carry, And Can Be Installed Anytime And Anywhere. Product Name: Door Sensor Alarm Ambient Temperature: -20~70 (℃) Scope Of Application: Doors, Windows Battery: Without 2 x AA batteries Notes: There Is No Free Battery When Placing An Order, Please Purchase 2 x AAA Batteries For Installation And Use. Material: abs colour: White Package Contents: 1 x door and window alarm 1 x remote control Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.