OBO DC12V Wired Doorbell with 4 Wires 3 Musical Chime Dingdong Door

Direction : None Security Mode : Fail Safe Model Number : B08 Brand Name : OBO HANDS Place of Origin : Guangdong, China (Mainland) Type : Wiaed door bell Power Supply : DC 12V Material : Fireproof ABS Working Temperature : -10-45 Dimension : 85 * 85 * 25mm Application : Hotel/ home/ apartment/ villa/ office/ door access control system,etc DC12V Wired Door Bell For Hotel/Apartment/house door access control system with 4 wires, no need battery Features: External wired door bell for security access control. Featured with soft, loud and clear 3 Ringtones for choice playing bell sound. Connect to DC 12V power directly. Can be used for a long time. Easy to install, wall-mounted . Switch is not included. A good replacement for the old and broken one. Specifications: Ringtones: 3 pcs Material: ABS Plastic Color: As picture shown Voltage: 12V DC Operating Current: 20mA Environment Temperature: -10-45 Relative Humidity: 40RH Installation: Wall-mounted Size: Approx. 85 * 85 * 25mm Weight: Approx. 0.1kg Wire Connection: Red: + 12 V Black: GND Green: BELL1 Yellow: BELL2 Package Included: 1 * Door Bell Selected quality materials Using ABS flame retardant material production,fire prevention, high temperature resistance,Can be used very long time. Precision components After the product is connected to the access control system, press the doorbell button of the access control to make a pleasant ringtone. High quality speaker High loudness 90dB speaker, crisp doorbell, not afraid of the owner can not hear No battery required Access control power supply, no need to install battery for doorbell Wiring Diagram: (Note: Both of the Access Control,