DC 12V Wired Doorbell Door Bell Alarm for Home Office Access Control System

Features: External wired door bell for security access control. Featured with soft, loud and clear ding dong playing bell sound. Connect to DC 12V power directly. Can be used for a long time. Easy to install, wall-mounted or double-sided adhesive paste. Switch is not included. A good replacement for the old and broken one. Specifications: Condition: Brand new and high quality Material: ABS Plastic Color: As picture shown Voltage: 12V DC Operating Current: 20mA Environment Temperature: -10 celsius -45 celsius Relative Humidity: 40percent RH-90percent RH Installation: Wall-mounted or double-sided adhesive(not included) Size: Approx. 8.6 * 8.6 * 2.5cm / 3.39 * 3.39 * 0.98in Weight: Approx. 90g Wire Connection: Red: + 12 V Black: GND Green: BELL1 Yellow: BELL2 Package Included: 1 * Door Bell .