1. Complete set mini wind power generator alternator kits. It needs yourself to assemble the wind generator, you can enjoy the DIY fun at the same time. 2. Simply charge your phone anywhere with this mini wind turbine power generator. 3. Simply plug your phones USB into supplied voltage regulator, your wind turbine in a wind stream (high wind power) and you have power generation. 4. Alternatorhas negative and positive pole, pls figure out which side is negative and which is positive, or it burn out. 5. It can be used as a wind power teaching experiment. Great to cultivate students and kids hands-on ability. Type:Wind Power Generator Alternator Motor Size: . 24.5mm x 34.2mm Fan Diameter: . 90mm Circuit Board Size: . 30mm x 25mm Output Voltage: DC 0.1-6V Output Current: 0.01-0.3A Rated Speed: 200-6000 RPM Output: USB 5V (0.2V) Quantity:1 Set Color:As shown Material:Plastic+Metal Package Contents: 1 * Wind Power Generator Set Only the above package content, other products are not included. Note: Light reflection 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.