metreno Door Stop Alarm Security Door Wedge Intruder Alert, Door stoppers for Door, Anti-Theft Wireless Security Alarm for Home Burglar Alarm Block System (Pack of 1 Pc) Door & Window Door Window Alarm  (Yes)

Material: Stainless Steel Cover; Operating Modes: Vibration Sensor; Alarm Volume: 120dB; Three Sensitivity: High, Medium, Low; Battery: 1 * 9V battery ( Does not include ); Size: 135 * 45 * 40mm; Switch: ON/OFF button. No installation required, Simply place the alarm behind any door, easy for travelers to carry. Mini size, space-saving. Wedge-shape design to fit any door. Prevents door from opening and immediately activates an alarm. Smart Door Open Alarm to give off siren warning once the door is push open, the 120db sharp alarming will scare away bad guys. Adjust the pressure sensitivity according to different situations. Effective way of deterring intruders, the alarm activated when the door is pushed open. It ensures your safety and peace of mind wherever you go. Usage: 1.Place this device under your door. 2.It will activated whenever the door being open and triggered the alarm. Package included: 1 Pc of door stopper.