Features: Electric regulation is specially for all kind of air pumps, water pumps, oil pumps, fan and other industrial control electric tools using three-phase brushless motor development and design, the defaults inlet Angle for long time and large current work, fan cold have overheats protections, when the external heat dissipation conditions is poor resulting in the temperature exceeds the upper limit of 100 degrees automatically reduce the power, the temperature drop to the lower limit of 90 degrees to return to normal. The drives works when power, no external signal is required, with potentiometer stepless speed regulation (button type through a single button to achieve acceleration and deceleration) This drive is three-phase brushless Hallfree control board motor can work normally without Hallfree. The BLDC wide voltages 6-26V highly-power small volumes (single-button potentiometer) three-phase brushless hall controller, single-button model supports single-button 100level frees switching acceleration and deceleration belt power memory function potentiometer governor model supports PLC 0-4.5V analogs signal stepless speed regulation. Single button (potentiometer) three-phase brushless Hallfree drive Specifications: Component:Plastic Size:Approx.4.5x2.6cm/1.77x1.02inch Model:X30 (Single button) X30V2(Potentiometer) Working voltages: 6-20V(limit 26V) for 2-6S lithium Driving current: Rate 16A fan cooling 25A Power:Rate 160W-200W Most 250W Most speed: 224,000RPM(2pole motor), 74,000RPM(6pole motor), 40,000RPM(12pole motor), 35000RPM(14pole motor) Package Includes: 1pc 3 Phase Motor Driver Module note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.