YL-526 Vibration Alarm Sensor, a compact anti-theft security device designed to trigger a loud siren when movement, shaking, or impact is detected.Primary Uses: Frequently attached to flat surfaces like the back of televisions, windows, or doors to alert owners immediately if an intruder touches or tries to move the protected item.Power & Output: Typically powered by two AAA batteries and emits a high-decibel alarm (around 100dB) upon sensing vibration