The driver board can drive hard disk brushless motors, CD-ROM brushless motors, and other micro brushless motors with 3 or 4 wires without Hall sensors. Features: 1. Reverse voltage protection 2. Over-current protection 3. Simple wiring and easy to use 4. Compatible with miniature 3-wire or 4-wire brushless motors without Hall sensors Specifications: Drive Voltage Range: DC 9 V–12 V Suggested Voltage Range: 9 V–12 V Maximum Current: 1.8 A Working Current: 1.2 A Speed Control Range: 0%–100% Phase Inversion Control: Supported Reverse Voltage Protection: Supported Over-Current Protection: Supported Weight: 24 g (approx.) Package includes: 1 x Motor Drive Board Note: Ensure secure and firm connection between the brushless motor wires and the drive board. Poor connections may cause damage. Use appropriately sized wires to ensure proper contact with the screw terminals.