9V-50V 10A PWM DC Motor Speed Controller 100% brand new and high quality Features: Controls the speed of a DC motor with this controller High Effiency, high torque and low heat generation With reverse polarity protection, high current protection Suitable for the DC motor (or DC load) within 10A Specifications: Working Voltage: DC9V-DC50V Control Power: 0.01-500W Quiescent Current: 0.02A PWM Duty Cycle: 10%-100% PWM frequency: 13khz Size: 5x5x2.6cm/1.97x1.97x1.02inch Quantity: 1 Pc