This is an optional Traxxas "Long" Temperature & Voltage Sensor. Temperature data is critical to monitoring performance, gauging the effects of changes, and preventing overheating. The Temperature Sensor features a precision thermistor and is installed on the motor or engine to continually monitor temperature as you drive. The Temperature Sensor can also be fitted to a speed control, battery, or exhaust pipe to monitor its temperature. 

Voltage measurement isn't just for electric cars; the voltage of a nitro vehicle's on-board battery is also critical. An accessory voltage/temperature sensor is available to measure receiver battery pack voltage on nitro vehicles. To monitor the voltage of your electric vehicle's battery, the Power Tap Connector is installed over the speed control's Traxxas High-Current Connector. Battery voltage is measured and displayed as you drive, making it easy to see voltage drop under acceleration and monitor battery performance. 

NOTE: In order to add telemetry to your Traxxas model, a TQi Radio System with Docking Base is required, as well as an iPhone or iPod with the Traxxas Link App installed. Most Traxxas kits require additional Traxxas chassis parts to install the telemetry system. Refer to your instruction manual, or click here for details.