Our 12V voltage regulator has 3 wires: 2 blue or green wires for AC voltage input from flywheel generator and one red wire for DC voltage output to 12V DC battery. Embedded electrical circuit is internally grounded to the case of part itself as the fourth grounding wire. It is equivalent to a 4-wire 12V voltage regulator. ข้อมูลจำเพาะ: น้ำหนัก: 0.2กก ขนาด: 79x70x27mm แรงดันไฟฟ้าขาเข้า: 15- 55V แรงดันขาออก: 13.8V +/- 0.3V