Durable with power efficiency, this product helps extend battery operating time and reduce power consumption. Keeping your video doorbell running can also help preserve 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 can be completed in minutes. No existing doorbell or additional wiring is required, and it can be installed on any door. 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 requiring an 18V adapter. Designed with high-performance materials, this product features a smooth, flexible design with an aesthetically pleasing appearance. The outer case 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 and long service life. Manufactured to strict standards, with fully insulated layered winding for enhanced safety and reliability.