Electronic Wired Door Bell 4 Wire Doorbell 90DB Ding-Dong Sound For access control For Office Home

Parameters:

Shell material: ABS

Internal original: good chip

Doorbell sound: 90DB

Power supply: direct access to 12v power supply

Working temperature: -10℃-80

Working humidity: <80%

Operating instructions: connected to the DC12V power supply, red to the positive pole (+), black to the negative pole (-)

Installation Instructions:

To install the machine, connect the wires and then just hang the doorbell on the wall screws.