In Depth Review of Kanlim 5v 12v DC Brushless Motor Driver Board 2X 5V 12V DC Brushless Motor Driver Board Controller for 3 4 Wires Hard 5V 12V DC Brushless Motor Driver Board Controller For Hard Drive Motor 7V 12V DC Brushless Motor Driver Board Controller for 3 4 Wires Hard 5v 12v Dc Brushless Driver Board Controller For Hard Drive Motor 3 4. 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