Features: OOTDTY   High-power DC motor governor; relay commutation; forward and reverse control. This motor speed controller is suitable for the use of brushed DC motors, but not suitable for the speed regulation of brushless DC motors. Current applicable range: rated current 30A, maximum 40A; speed regulation range: 0-. Recommended: within 12V 250W, within 24V 350W, within 48V500W DC brush motor. Can not use 48V battery, battery power supply. Specifications: Material: Aluminum Applicable Voltage Range: Dc 10v-60v Current Applicable Range: Rated Current 30A, Maximum 40A Speed Range: 0- Product Frequency: 16khz Recommended: within 12v 250w, within 24v 350w, within 48v500w Dc Brush Motor Package Includes: 1x Motor Speed Controller Note: 1. This governor is used for brushed DC motors. 2. It is not suitable for speed regulation of brushless DC motors; nor can it be used as a voltage regulator or voltage stabilizer! 3. Do not use 48V battery or battery for power supply. 4. Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.