For doorbell charging cable product parameters: Doorbell power supply -18 Volt doorbell power adapter, plug into standard 110 Volt - 120 Volt socket, convert to 18 Volt 500MA AC cable length 26.2 ft (white) Doorbell wire compatible with：Ultra long 26.2 ft wire 18 volt universal American power cord powers the popular smart doorbell. Compatible with Ring video doorbell, Ring video doorbell 2 and Ring video doodle pro, Skybell, Nest, Eufy, Arlo doorbell, etc For Ring doorbell plug practicality:Easy and quick solution to the "low battery" problem, which means your video doorbell can work for you at any time, without having to remove the battery to recharge it, which is what we want it to do for you Doorbell hardwired kit quality and durability:High quality construction provides you with safe product protection.This type of transformer passes rigorous testing to ensure the best and long-term performance for its application Doorbell power supply Installation method:Connect the two ring terminals to the screws on the back of the doorbell. The wire loop design makes installation easier and helps ensure that the adapter is securely attached to the doorbell.The wire is strong and flexible enough not to tear Service:We are committed to providing excellent customer service and your peace of mind is our top priority.We always offer you a two year warranty. If you have any questions about this product, please feel free to contact us via Amazon email or questions and answers, we will solve your problem within 24 hours, your satisfaction is our company's purpose ANYINELEC 18 Volt doorbell power Wide Compatiblity power cable powers popular smart doorbells. Power Supply Adapter Replacement for Ring can connect you Video Doorbell to the power adapter directly,forget the hassle of charging your battery and let continuous operation Super compatibility: Compatible with,video doorbell, Blink video doorbell, simplesafe video doorbell,Google Nest Hello, Nest video doorbell, Nest Hello video doorbell Qualfication and durability：with high quality construction, the safety product guaranteed for you. This transformer has passed strict tests to ensure optimal and long term performance for its applications Installation method :Connect the two terminals to the screws at the back of the doorbell. The wire design makes it easier to install and helps ensure the adapter is firmly connected to the doorbell. The wires are sturdy and flexible enough not to be easily torn If you have any question about this commodity, please feel free to contact us through amazon email or question and answers, we will solve your problem within 24 hours,your satisfactionis the purpose of our compa