FUNCTION: The motor speed controller has low voltage, stall and over-current Soft start can solve the damage caused by instantaneous high current to speed controller BLOCKING The motor speed controller has blocking protection(20A current limited) which can limit the high current produced by the blocking of the motor ADVANTAGE: The motor speed controller can make it more easy to control the speed, and make ultra-high power control easily. The maximum current is 20A. It is recommended not to exceed it SPECIFICATION: Input voltage: DC 10-60V, Output voltage: Linear output under load, Regulating type: regulating current, Regulating speed range: 0-100%, Size: Approx. 9.6 x 6.1 x 3.4cm NOTE: The input terminal must be divided into positive and negative input. The input voltage must be the same as the rated voltage of the motor(within DC 10-60V). Can not input AC 220V, or it will burn up the module directly, Weight: 0.24030386558 pounds, Manufacturer: Fafeicy