Specification:  Material: ABS Material.  No-Load Max. Output Voltage: 5V.  Max. Output Current: 0.2A.  Storage Method: Well-ventilated, dry, indoor temperature preservation.     Note:  Please don't overexert in order to avoid damage of the geers, 2 rounds per second is recommended.     Features:  - Handheld electricity generator can create power without batteries   - Simply shake the handle, make the fan rotates and also create a DC electricity which can be connectted to electrical circuits via binding posts.  - Made with a clear plastic casing, students can clearly see the motor, gears and wiring.  - This grip style handle generator allows connection to electrical circuits. Screw out the miniature light bulb, can be used with almost any experiment requiring up to 5 volts DC.   - This science kit is perfect for demonstrating the energy transformed from mechanical to electrical.     Package Included:  1 x Handheld Crank Generator Fan Kit