This is the Traxxas High-Voltage Power Amplifier for the UDR (Unlimited Desert Racer). This accessory is used to provide extra power to the UDR's electronics, allowing it to reach higher speeds and perform better in extreme conditions. The amplifier is mounted on the front of the UDR, and plugs into the battery pack. It includes a separate power switch, and can be used with either NiMH or LiPo batteries.
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