To solve the problem of "Low batter".Run the 5 meters wire along the wall from the outlet to the doorbell.Easy to installation: Just connect the 2 copper wire tips to the screws on the bracket of the doorbell.Name:Power supply adapter for video doorbellModel:180500Cable Length:5MInput:EU: AC 230V 50HzUK: AC 230V 50HzUS: AC 120V 60HzOutput: AC 18V 500mAPlug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on.Plug Type:UK plug,it applies to Malaysia, the United Kingdom and so on.Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so onMaterial:plasticcolour:blackPackage Contents:1 x Power AdapterOnly 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 +/- 1-3cm.