120db Ultra Loud Alarm：Hang The Alarm On The Door Handle. When Someone Touches The Handle, The Alarm Will Sound 120Db, Which Can Be Heard Outside 500Ft To Warn Intruders. When you install the touch sensor in your house, office or factory, it will ring to alarm once children open the doors and windows or a theft breaks in.Adopts ABS material, lightweight, antirust and durable Security and Anti-theft：In hotel you can install it on the the door or window to ensure safety. After check-out it can be prepared for next-time use. You can easily hang it on the inside door handle in no need of special wires, turn it on and the loud alarm will frighten away unwelcome invaders, thus protecting you and your families Working Principle: hang up the triggered home security alarm, and after the red light flashes for about 30 seconds and stops, the door alarm officially enters the alarm state; When someone touches the door handle or opens the door or window and generates vibration, the alarm will immediately sound an alarm to remind you. The alarm sound is up to 120 dB, no omissions, no false alarms Wide Application: These door entry alarms are suitable for various kinds of doors and windows with handles, applied in families, rental rooms, dormitories, hotels, shops, warehouses and other places of anti-theft, also an effective helper for traveling to protect the safety of you and your family Quality Service：This product has been professionally and strictly inspected and tested. We have a 24-hour online professional customer service team. If the product has any quality problems or you have any questions about this product, you can contact us at any time,we will try our best to solve your problem in time,please rest assured to buy, Weight: 0.15 Pounds