110 dB Siren door knob alarm

Door Knob Alarm Knobing alarming 1.Technical parameters Operating Voltage: DC 9V (9V alkaline battery), You can easily find out at your local market. But my company could confirgure for you. The price is 0.2 USD/unit. Alarm sound pressure: 120dB Induction method: electric field induced body Application: doors, windows Installation: hanging on the door, window Product Dimensions: 101 × 55 × 26mm Package Size: 146 × 76 × 28mm 2. Usage: Function: Hanging in the home, companies, hotels or factories door lock, when the thieves or rogue touch or picking the lock, it will be issued to warning you immediately check out, to take appropriate measures to ensure that you and your family's life and property ; travel, travel stay at the hotel, you can own the product safety and hang in your house with locks on the inside gives you maximum security, when you leave,you can easily remove the alarm