Specifications: Operating voltage: 10V-55V Output voltage: Linear under load Input current: Require large than the motor operating current Output current: depend on load size Output current: 0-100A Continuous current: 60A Current at rest: 0.01A (standby) Maximum power: 3000 W (power = voltage * current) Motor Power control: 0.01-3000 W, 12 V: 720 W (max), 24 V: 1440 W (max), 36 V: 2160 W (max), 48 V: 2880 W (max), 50 V: 3000 W (max). Knob hole: 7mm Speed type: adjustable current Speed mode: ON \ OFF linear potentiometer 270 degrees Speed range: 0% -100% Frequency control: 15 KHZ Speed Control: potentiometer (with switch) Knob Specifications: 100 K (with switch) Speed type: flow control Advance rotation: Support Digital positioning screen: 0-100 (full speed percentage) Board size: 120x96mm/4.72x3.78" Quantity: 1 Pc Note: Please allow 1-3mm error due to manual measurement.pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! No Retail Package Package Includes: 1 x DC Motor Speed Controller