Hang the security alarm on the door lock of home, company, hotel or factory, it will send an alarm when sensing a thief touching or shackling, notify you to check in time and take corresponding measures to ensure the life and property safety of you and your family. On a business trip or travel, when you are staying at the hotel, you can hang your alarm on the door lock in the room where you live to guard against thieves. When checking out, you can remove it freely and easily for the next time use. Features: 120dB super loud alarm ringing frightens thieves away, more secure in use. Human body electric field induction, high sensitivity, alarm when thieves' hands are within 1cm close to the door lock. Hang on the door lock or window in your room to protect your life and property safety. Easy installation with no wiring, small and portable, convenient to use. Also suitable for use in your dorms, cabinets, and suitcases. Instructions 1. Open the battery cover in the direction of the arrow behind the touch sensor alarm and put in battery. 2. Hang the lead of the touch sensor alarm on the metal door handle or the door lock, push the switch up in place, the touch the alarm will enter the alarm monitoring state and immediately whistle to alarm when someone touches the door handle or the door lock. 3. Extend the lead of the touch sensor alarm by electrical connection, connect it to the metal protection net of exhibits, guardrails, wires and cables and active garages, and turn the switch up in place. After 5 seconds, the touch the alarm will enter the alarm monitoring state and immediately whistle to alarm when someone touches the protected object. 4. Turn the switch down in place to stop the alarm. Specification: Condition: Brand New Material: ABS plastic Working voltage: DC 9V GF22 alkaline battery (excluded) Alarm sound pressure: 120dB Induction method: Human body electric field induction Scope of application: Wooden door, window Installation method: Hang on the door lock, window Package Weight: Approx.59g/2.1oz Package List: 1 * Alarm