Features Basic Value: DC motor speed controller input voltage is DC10 to 60V, the limit power is 1200W, and the speed regulation type is current regulation. Stable Performance: The simple and easy using DC motor speed controller has a small size and elegant appearance. Very stable performance. Small Torsion: DC motor speed controller has high efficiency, small torsion and low heat generation. It is very easy to install. Reverse Connection Protection: The speed controller is equipped with power reverse connection protection, control voltage overvoltage protection, and 20A fast ceramic fuse. Excellent Circuit Board: The speed controller module is made of excellent circuit board, the motor speed controller has good performance and longer service life. Specification: Item Type: DC Motor Governor Material: PCB Input Voltage: DC10 60V Output Voltage: Linear Under Load Output Current: 20A (Long time use 10A, 450W or less, pay attention to keep the module unobstructed cooling conditions) Ultimate Power: 1200W Type Of Speed Regulation: Current Regulation Speed Regulation Mode: Potentiometer (Linear) Speed Regulation Duty Cycle Range: 0 To 100percent Control Frequency: 25KHZ Wiring Type: Fence Type Terminals Knob Wire Length: Approx. 20cm / 7.87in Potentiometer Press Fit Opening: Approx. 7mm / 0.28in Input Is 9 to 60V Within The DC Power Supply: POWER+ POWRE- Motor: MOTOR+ MOTOR-  Package List:1 x DC Motor Speed Regulator Note:Please Notice:1. This speed regulator is for the use of DC brush motors.2. Not suitable for speed regulation of DC brushless motors, nor can it be used as a regulator or voltage regulator! Package List 1 x DC Motor Speed Regulator