Snail Mini Dynamo LED Anti mosquito Flashlight… this product adopts the principle of hand cranking to generate the power. The groupware of the hand take the groupware of wheel to make the alternating current when the hand is cranked. Then the current be commutated, to charge the recharge battery inside, and then be used for lighting. I am not sure about this but I think the gadget also makes a noise to deter mosquitos.
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