4 Pack Vacuum Cleaner HEPA Filters for Cyclonic Series RO3753EA RO3731EA RO3786EA Made of fine quality materials, firm structure, wear resistant and with stable performance.Adopts efficient motor and planetary gear transmission, with high working efficiency.Simple construction, easy operation.Easily lights up a bunch of LED lights by hand-cranking.It can be used as standby lighting power supply, charging, experiment, teaching, hydroelectric generator.This is a kind of quality wind generator, which adopts efficient motor and planetary gear transmission, with high working efficiency. Easily lights up a bunch of LED lights by hand-cranking. It adapt to make standby lighting power supply, rechargeable, test, teaching, hydroelectric,etc. It can be applied to make standby lighting power supply, rechargeable, test, teaching, hydroelectric device, and etc.. You can have a try.Also can be used to make a small experiment, can be used as a recharging device for small capacity battery, and so on.Name:Wind Power DynamoOutput voltage:12V, 24VMax.output current:1500mAMax.load power:20WColour:Black & SilverMaterial:ABS+MetalSize:130x35x35mm/5.12x1.38x1.38inPackage Contents:1 * Wind Power DynamoOnly 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.