ESC is developed and designed for all kinds of industrial control electric tools such as air pump, water pump, oil pump, fan using DC three-phase brushless motor, default in the of high current work for a long time, it is recommended to fan cooling indeed with overheating protection, when the ESC external heat dissipation conditions are poor resulting in temperature over 100 degrees automatically reduce power, the temperature to 100 degrees to normal. The new BLDC wide voltage 7-24V high power small volume potentiometer speed control brushless without Hall controller, support 0-5V touch volume signal speed control. Product name: three-phase DC brushless without Hall drive Operating voltage: 6.5-24V Drive current: rated 12A plus fan cooling to 20A Maximum speed: 224000 RPM (2-pole motor), 74000 RPM (6-pole motor), 40000 RPM (12-pole motor), 35000RPM (14-pole motor) Colour:As Shown Material:ABS Package Contents: 1 x DC motor controller Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.