【24V C Wire Power Adapter】24V Doorbell Transformer Adapter that supplies constant AC 24‑volt power to your popular smart thermostats and doorbells — compatible with Nest (1st/2nd Gen), Ecobee, Sensi, Ring, Nest Hello, Wyze, Eufy. No need to worry about device matching issues, doorbell transformer 24V adapter can meet the power supply needs of various devices, giving you more peace of mind 【UL Certification for Safety and Reliability】Our doorbell transformer adapter is UL Certification, meeting strict safety and quality standards. This certification ensures dependable performance and gives you peace of mind for safe, long-term use in your home 【24V 500mA Doorbell Power Adapter】 Quickly solves “low battery” issues by providing direct charging—just plug the adapter into an outlet to power your device continuously. No need to remove the battery for charging, eliminating the hassle of frequent battery changes and ensuring your smart doorbell or thermostat runs smoothly without interruptions or low battery alerts 【Easy to Use】Easy to install in minutes—simply assemble the cable along the wall from your outlet to the doorbell or thermostat, no existing doorbell or wiring required.(Note:The 2 pin non polarity wire is not divided into positive or negative) 【22.96ft Long Cable for Flexible Placement】Our 22.96ft (7m) extra long cable eliminates worries about the distance between the outlet and your device, allowing easy and flexible indoor and outdoor installation. The included 48 cable clips help you organize cables, prevent tangling, and keep your setup neat and secure Compatibility: 24V doorbell transformer adapter compatible with Nest (1st/2nd Gen), Ring, Nest Hello, Wyze, Eufy. Installation Guide For doorbell: connect the two ports to the screws on the back of the doorbell For thermostat: connect the two ports to C and Rc terminal for most thermostat Specification: Input voltage: 120 Volt /AC, 60 Hz. Output voltage: 24 Volt /AC, 500mA Cable length: 22.96 feet/ 7 m Package includes: 1 X 24 Volt C Wire Adapter 1 Bag (48 pieces) of white cable clips Note: This is a compatible spare part and the manufacturers' names has been mentioned above for reference purposes only, not for trademark usage, our trademark is Dreyoo