Specifications: Product Name: Potentiometer Three-phase DC Brushless and Hallless Drive Model: X30A (Potentiometer) Working Voltage: 7-24V Drive Current: Rated 15A Plus Fan Cooling 20A Maximum Speed: 224000 RPM (2 pole motor), 74000 RPM (6 pole motor), 40000 RPM (12 pole motor), 35000 RPM (14 pole motor). Product Size: length 45MM*width 26MM*height 12MM (excluding wires and protruding capacitors) Precautions: 1. There is no fuse in the power supply circuit on the motherboard. Jianyi has added it himself. Reverse connection of the positive and  negative poles of the power supply will cause permanent damage to some of the chips on the board (even if it does not work for 1 second). 2. There is motor blocking protection during normal operation. Because the power and current of the module are large, please do not artificially short-circuit when the module is not working normally. Once the short-circuit may burn the line and the tube may burst, please use the small for the first wiring test. Current low voltage test, after ok, then pass high current and high voltage to work. 3. Do not connect the motor that is obviously inconsistent with the drive module voltage, current, or power, to avoid inexplicable "nonsensical" damage. Package Information: Package Size: 8*5*3cm Package Weight: 28g Package List: 1*DC 7-24V 200W BLDC 3-Phase Brushless Motor Driver