High-volume slim alarm that detects impact and opening, providing peace of mind with easy installation. The item has been opened but is in near-new condition and has been stored. The adhesive on the back of the small magnet has lost some stickiness, but otherwise, there are no problems. I have confirmed that it works. There is not much sign of use, but please refrain from purchasing if you are overly concerned about condition. I will sell it to those who understand. - Brand: ELPA - Model: ASA-W13PW - Function: Impact detection, opening detection - Type: Slim alarm - Accessories: Instruction manual, double-sided tape - Alarm sound: High-volume alarm - Installation method: Easy installation Thank you for viewing.