This drive is a DC three-phase brushless and Hall free control board The motor can function normally even without Hall effect BLDC wide voltage 5-50V high power 380W DC three-phase high-speed brushless and inductive controller Main board specification parameters: Working voltage: 5-50V (limit 60V) Driving current: rated 16A plus air cooling and heat dissipation 25A. Maximum power: 380W Overcurrent protection: Yes Locked-rotor protection: Yes (current automatically drops after locked-rotor operation) Over-temperature protection: Yes (over-temperature power is halved) Maximum speed: 224,000 rpm (2-pole motor), 74,000 rpm (6-pole motor), 40000 RPM(12-pole motor) and 35000RPM(14-pole motor). Note:due to different printing batches, if there is a slight difference in the color of the object, it not affect the use. Color:Yellow & Green Material:PCB Package Contents: 1 * Driver board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.