The driver board can drive hard disk brushless motors, CD-ROM brushless motors and other micro brushless motor of line 3 or 4 wires without hall sensor. Features: 1, Support reverse voltage protection. 2, Support over current protection. 3, Simple wiring and very easy to use. 4, Suitable for hard brushless motor, brushless motor drive and other miniature 3-wire or 4-wire brushless motor without hall. Specifications: Drive Voltage Range: DC 9 V-12 V Suggested Voltage Range: 9 V-12 V Current: 1.8 A(if higher than 1.8 A, chip might be burnt) Working Current: 1.2 A Speed Control Range: 0%-100% Phase Inversion Control: Support Reverse Voltage Protection: Support Over Current Protection: Support Weight: 24 g(approx.) Package includes: 1 x Motor Drive Board Note: The wire of brushless motor should be connected firmly with drive board. Bad connection may cause item burnt. Please use large wires, because of the clearance of screw. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List 1Support reverse voltage protection 2Support over current protection 3Simple wiring and very easy to use 4Suitable for hard brushless motor, brushless motor drive and other miniature 3-wire or 4-wire brushless motor without hall 5Wire of brushless motor should be connected firmly with drive board