Durable with power efficiency, this product helps extend battery operating time and reduce power consumption. Keeping your video doorbell running smoothly can also contribute to longer battery life. (Note: Before using this product, remove the battery from the doorbell.) Easy installation—simply route the cable through the door opening and connect it to your ring. Setup and configuration can be completed in minutes. No existing doorbell or additional wiring is required, allowing installation on most doors. The cable length is 5 meters. 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 require an 18V adapter. Designed with high-performance materials, this product features a sleek, flexible design with a smooth finish. The outer casing is made of flame-retardant, impact-resistant PC-ABC material, safe for human contact. The power supply features an anti-slip matte design. Offers strong resistance to gloss, oxidation, and humidity. Built for durability with simple construction, this product is manufactured to strict standards, featuring fully insulated layered winding for enhanced safety and longevity.