3X 7V 12V DC Brushless Driver Board Controller for Hard Drive Motor 3 4 5V 12V DC Brushless Motor Driver Board Controller for Hard Drive Motor 5V 12V DC Brushless Motor Driver Board Speed Control with Phase 5V 12V Brushless DC Motor Driver Controller Board with Reverse Voltage. Features: For driving micro line 3 or 4 lines no Hall brush less motor such as Hard disk brush less motor, Drive brush less motor With Reverse Voltage Protection,OCP(over current protection) Specifications: Material: PCB Color: Green Size: 31*45mm Diameter of location hole: 3mm Driving voltage: 5 12V Working current: 1. 2A Speed adjustable range: 0% 100% Note: The brush less motor line must be pressure sturdiness when receiving terminal drive plate , poor contact will burn out the chip phase operation deficiency. If there is a interval between the board terminals and fixed screw, please use coarser line connected to the board. Package included: 5 x Brushless Motor Driver Board Controller