The driver board can drive hard disk brushless motors, CD-ROM brushless motors, and so on. It features reverse voltage protection, overcurrent protection, and phase reversal control. It is a high efficiency, high quality analog amplifier and digital amplifier. Features: High performance, digital amplifier module has more than 90% high efficiency and low distortion. Fully functional, high efficiency, low quiescent current. The speakers can be effectively protected. Complete protection features, overcurrent/temperature/short circuit protection and reverse connection protection. 100% brand new, high quality sound reproduction. Low power consumption, low heat value. Specification: Material: plastic and electrical components Color: green and black Driving voltage: DC5-12v Working voltage: ≤1.2A Speed adjustment: 0%-100% Size: Approx. 6 x 3.5 cm / 2.4 x 1.4in Quantity: 1Pc Package list: 1 x Driver Board Controller Note: 1. The receiving terminal driver board of the brushless motor line must be pressed firmly. If the contact is poor, the phase loss operation will occur and the chip will be burned out. For plate terminal fixing screw clearance, use a thicker wire connection plate. 2. Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. 3. The measurement allowed error is +/- 1-3cm. 4. 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. 1、High performance, digital amplifier module has more than 90% high efficiency and low distortion. 2、Fully functional, high efficiency, low quiescent current. The speakers can be effectively protected. 3、Complete protection features, overcurrent/temperature/short circuit protection and reverse connection protection. 4、100% brand new, high quality sound reproduction. 5、Low power consumption, low heat value.