Durable with power efficiency, this product helps extend battery operating time and reduce power consumption. Keeping your video doorbell running efficiently can also help prolong battery life. (Note: Before using this product, remove the battery from the doorbell.) Easy installation—simply route through the door opening and connect the cable to your ring. Setup and configuration 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. High-performance materials provide 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. Resistant to gloss, oxidation, and humidity. Simple construction ensures long-lasting durability. Manufactured to strict standards with fully insulated layered winding for enhanced safety and longevity.