Durable power supply extends battery life and reduces power consumption for your video doorbell. Keeping your video doorbell powered can also help extend battery life and reduce power consumption. (Note: Before using this product, you must remove the battery from the doorbell). Easy Installation: Simply run the cable through the door and connect it to your Ring. Installation and configuration can be done in minutes. No existing doorbell or new wiring is required, and it can be installed on any door. The cable length of this product is 5m. Compatibility: Compatible with Nest Hello doorbell, Arlo video doorbell, Eufy video doorbell, Simplisafe video doorbell, Zmodo Smart Greet Wi-Fi video doorbell, and other doorbells that need an 18V adapter. High-Performance Materials: This product features a sleek and beautiful design. The outer casing is made of flame-retardant and drop-resistant PC-ABC, which is harmless to the human body. The power supply is housed in a drop-resistant matte finish. Strong resistance to gloss, antioxidants, and moisture. Simple Construction and Long Lifespan: This product is manufactured in strict accordance with standards, and the layer-wound winding is fully insulated to make the product safer and more durable.