The power adapter is compatible with all versions of Ring Doorbell. This Ring transformer is compatible with Ring Video Doorbell, Ring Video Doorbell 2, and Ring Video Doorbell Pro. Simply run the 5-meter cable along the wall from your outlet to the doorbell. With an AC output of 18V/500mA, avoid the hassle of charging the battery by directly connecting your Video Doorbell to the power adapter. Easy to install - simply connect the two copper wire tips to the screws on the doorbell's bracket and you're ready to go. Then you can use your Video Doorbell and Nest Hello Video Doorbell continuously without having to remove your doorbell. Plug Type: EU plug, it applies to Indonesia, Germany, France, Spain, Italy, and so on. Input: AC230V 60Hz 0.2A Output: 18V AC 500mA Doorbell Type: Wired Power Source: AC Size: 6x5cm, Cable length: 500 cm/196.8 inches Color: Black Material: Plastic Package Contents: 1 x Power Adapter Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.