This is a wireless vibration security alarm which you stick to the door/windows or put in your car, bike and more. it detects vibrations and & makes a loud alarm. it comes with a wireless remote control to arm or disarm the alarm system. it is really good for homes, offices, shops, cars, bikes or other places and will keep off thieves, intruders or trespassers. it has 3 alarm modes—the first alarm mode makes noise each time it detects vibration on the door or window—the second alarm mode makes a warning noise on first vibration detection then a nonstop noise until the alarm is disabled by the remote—the third alarm mode immediately turns on alarm noise when pressed.