【20V C wire power adapter】plugs into your standard 110 v/120 v outlet and converts to 20 volt 500 ma AC current【Doorbell transformer power supply】quality designed to compatible with eufy video doorbell, just charge directly, no need to remove and charge up the battery, convenient and practical to solve the problem of low battery【UL certified】UL certification passed, stable and durable operation 20V transformer【Easy to install】2 pin non-polarity wires support easy and quick installation, 16.4 ft cable is long enough to plug it into an electrical outlet inside or outside your house【Packing list】1 x doorbell power supply, 1 bag (50 pieces) of black cable clips; The brand mentioned above is just for demonstrating compatibility Product Description 16.5ft cable with gift cable clips, long enough to plug it into an electrical outlet inside or outside your house. UL certification passed, stable and durable operation 20V transformer. Don’t have to worry about danger if you have children or pets in home. 1 bag 50 pieces of black cable clips for easy fixing of cables. Input 120 VAC 120 VAC 120 VAC Output 20 VAC 500mA 20 VAC 500mA 24 VAC 500mA Compatible with Eufy Arlo Wyze Cable long 16.4 ft 16.4 ft 16.4 ft