Doorbell power adapter: Our team has done a lot of research and research to comprehensively solve the problem of noise and excessive voltage, with a new design to make your doorbell work more perfectly. Wide range of applications: compatible with Ring, Nest, Arlo, Eufy, Wyze and other large number of video doorbell equipment. High quality material: ring doorbell power supply housing is made of PC fireproof material, The 196-inch cable is more suitable for your installation needs. If you need other specifications, you can enter the store to choose. After-sales service: XZGM is a professional power transformer design and production team, has been improving the use of consumer troubles, if you encounter any problems in the use of the process can always contact us, our team will provide you with a solution to your satisfaction, wish you a happy life! XZGM Our team is specialized in the research and development and sales of transformers. We study and design better solutions for any problems of transformers with great efforts and abilities to make you a better purchase experience. Clink contact seller anytime if there's any questions. We're here to help you solve the problems!!! Specification: Box size: 95 x 50 x 85 mm Input: 120V AC 60Hz 0.2A Output: 18Vac AC 500mA Cable length: 500 cm (196.8 inch) Compatible with: Ring Video Doorbell Ring Video Doorbell Pro Ring Video Doorbell 2 Zmodo Smart Greet Wi-Fi Video Doorbell Package includes 1 x 18v Black Video Doorbell transformer 1 x 500cm (196.8 inch) cable.