24Volt Power Adapter/Transformer,C-Wire Adapter Thermostat，Compatible with Honeywell,Ecobee,Nest and Sensi Smart WiFi…

Attention:To prevent no power output, you must ensure that the terminals are stripped and securely clamp the screw terminals into the thermostat to maintain good contact.
personal advice： required to ask the person who understands the electrician to install.
Be advised, the initial ends on this wire are treated and if you cut them to shorten it, the copper is tougher to get into the thermostat with pinch vs. screw terminals.Will result in no power output.For Nest E connected this adapter to the C and R pins (R also having the HVAC’s Red line connected)

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HOME USE: Plug the transformer into your standard 110V /120V outlets and converts to 24 volt AC current.
SUPPORTED DEVICES: The 24v power adapter can not only power for popular smart thermostats such as Nest, Honeywell, Ecobee, Hive, Emerson Sensi, but also can convert to 24 volt AC current for other devices that require 24v current for operation.
TECHNICAL SPECIFICATIONS: Our battery backup input voltage is 120 V AC, 60 Hz; Output voltage is 24 V, 300mA/AC.
EASY INSTALLATION :To prevent no power output, you must ensure that the terminals are stripped and securely clamp the screw terminals into the thermostat to maintain good contact，2 pin non-polarity wires to ensure easy and error free installation for installers of all skill levels and knowledge bases，If your wiring is complicated, please ask a professional electrician for help.For Nest E connected this adapter to the C and R pins (R also having the HVAC’s Red line connected)
EXTRA LONG CABLE: 7.6M (25ft) long cable enables you to install the cable along the wall and connect to the electrical outlet inside or outside.