Check the listing for details. 6 Set Mini Generator Motors 3V-12V DC Motor Wind Turbine Generator with Mini. Condition: New. Listed at 14.12 USD. Designed Beginner Kit: 6 PCS mini dc motor, 6 PCS Motor Mounting Bracket Holder and 3 PCS different colors 4 Vanes shaft propellers and 3 PCS 3 Vanes shaft propellersParameter: Different voltages correspond to different speeds. Voltage: DC 3V, rated speed: 1500 RPM, voltage: DC 4.5V, rated speed: 2500 RPM, voltage: DC 12V, rated speed: 6500 RPM. Color: silver. Motor Body Diameter: 24mm/0.94"Two-way Conversion: When the bearing rotates, it generates electricity, when receiving power, the bearing will rotate. This mini wind generator set enables the conversion of kinetic and electrical energyGood Gift: This learning toy is good for curious kids, let the children know the driving principle of the motor, how the propeller rotates to produce wind. Cultivate children's practical ability, so that knowledge is no longer theoreticalWarning: Suitable for 8+ years, please see the picture carefully, use the correct circuit diagram to avoid short circuit, short circuit will produce high temperature and cause the battery holder case to melt and burned, the kids must use under the supervision of adults Product Description Qunatity 115 PCS 14 PCS 26 PCS 131 PCS 14 PCS 98 PCS