Brushless Motor Analyzer; RPM, KV, Voltage Checker, Motolyzer (Sensored & Sensorless)This motor analyzer is a precision electronic device that is specially designed for measuring the KV value, RPM, current draw, motor timing, vibration noise level, and function of hall effect sensors of a brushless motor. It comes with a 2X16 character LCD that is able to display real time values of either sensored or sensorless brushless motors. KV VOLT RPM AMP: KV (RPM per Volt) Shows the rotor RPM Volt at a certain throttle power level. U (VOLT)