• 24V power supply with stable output for perfect and noise-free operation of your video doorbell. • Compatible with most video doorbells, including Ring, Nest, Arlo, Eufy, and Wyze. • Includes an 8-meter extension cable to facilitate connection to a power outlet, both inside and outside the house. • Made with high-quality materials: flame-retardant PC material housing and pure copper core cable for greater durability. • Easy to install: no need to remove the original battery, simply connect the cable to both ends of the doorbell transformer. • Developed by XZGm, a professional team in transformer design and production, focused on improving the consumer experience.