Keproving 2pcs Mini Vertical Wind Turbine Generator Model for Teaching Physical Power Generation Principle and DIY Science Education Experiment

Used these as rear light on my ebike! Man did these things light up at night and always had heads turning I think some people started calling me doc holiday after I put these on!!!!

I use these generators with wind spinners i build. They power LEDs nicely when driven by a 4 inch laundry line style roller affixed to the propeller shaft. I also cut down the plastic generator hub to improve the "gear ratio".These generators are built to higher standards than the price reflects. I have used eleven of them in projects so far and regardless of the weather extremes here in Alaska, there is no reduction in power output or defects I have noticed in the nine months of usage I've enjoyed.

Only 2 to 3 inches tall.

Great product. Bought these for an electrical learing aid for my daughter. They provide enough power to light a small LED. These are not "wind" capable, but do provide enough surface area for forced air, even by mouth. They do require fast rotation to provide any real voltage, but they are easy enough to rotate by blowing onto the vanes. A fan, blower, or compressed air may work as well.

poor quality。easy broken

Just a toy

everything as expected

These wind generators essentially need a hurricane to spin them and produce electricity. Do not waste your money!