Door Window Magnetic Contact Alarm Burglar Security Safety System for Shop Garage Supermarket Features: The shell is made of ABS plastic with matte finish and high-end appearance. When the magnet is close to the switch, the reed contacts are closed and the signal line is connected. If the door is opened, the magnet leaves the switch, the reed contacts are disconnected, and the signal line is interrupted. When someone illegally prizes the roll door open by 2-3 cm, the product immediately sends a signal to the host. The horn in the host will send out a loud alarm sound, so that the illegal can not start. Suitable for shops, stores, garages, supermarket, and other places. Easy to install, it can be easily installed on the roll door. Specification: Housing Material: ABS Color: Dark Brown Maximum Switching Voltage: 100V, 200V DC (optional) Maximum Switching Current: 0.5A Maximum Switching Power: 10W Output Mode: Normally Open, Normally Close(optional) Package list: 2 * Door Magnetic Alarm Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store