hand generator power supply 100% brand and high quality Simple construction, easy operation. Efficient power generation engine, planetary gear transmission, high efficiency. It adapts to make standby, rechargeable, test, teaching, hydroelectric power supply, etc. Output voltage: 5V-24V Type: Wind Power Generator Maximum output current: 1500mA Maximum load power: 20 W Color: black and silver Dimensions (approx.) 130 x 35mm / 5.1 x 1.4 inches Material: Metal, plastic Package Contents: 4 x Hand Generator 4 x Bubble bag Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.