HobbyKing

The HobbyKing R2 Speedometer is a car speed recorder designed for RC car hobbyists. It allows the user to record the car's max speed, acceleration, battery voltage, and even motor RPM! Features:-Measures and records present car speed, max car speed, and average car speed-Measures the time it takes to reach a designated speed-Accurately measures battery voltage-Accurately measures motor RPMSpecs.Working temperature: -20°C to 50°CWeight: 21g (without connection wire)Dimensions: 33x11x69mmInput voltage range: 3~24V (7.4V recommended)