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The Honeywell Home R300-12033 5VDC Power Transformer, plug-in power adapter for the Resideo 5828 and the 5828V wireless keypads. It allows the keypads to active at all times. This compares to being only powered by the included (3) AA alkaline batteries.
Main Features
5V DC Plug-in power adapter
Helps conserve the battery and prevents the keypad from going into sleep mode.
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