About this item - FEATURES : Input:120V AC 60Hz, Output:24V AC 500MA, Length: 315inch/26.25ft/8m, Wire Type: Stranded copper wire. The power supply adapter compatible with your popular smart thermostats and all versions of doorbell and other devices that require constant 24 volt power for operation. - INSTALL : Assemble along the wall from your outlet to the doorbell and thermostat without the existing doorbell or wiring. Connecting the power supply adapter to your Video Doorbell takes just several minutes. - COMPATIBILITY : Replacement for various doorbell, including in Ring Video Doorbell Pro, Ring Video Doorbell 2, Ring Video Door bell, Nest Hello Video Doorbell, Greet Select Smart Doorbell, Greet HD Smart Doorbell and Greet Pro Smart Doorbell etc. (Note: Please confirm that the voltage and current required by the doorbell are consistent with this power supply. Please consult the Volt...