Features Manual Power Generation: Just turn the handle of the hand generator, and the electricity generated will brighten the bulb. The faster you turn the handle, the more power is generated. Power Generation Without Batteries: The handheld generator can generate power without batteries, which is very suitable for classroom physics teaching demonstrations. Good for Observation: The hand generator is made of transparent plastic casing, students can clearly see the working process of the motor, gears and wiring. Suitable for Demonstration: This science kit hand generator is very suitable for demonstrating the process of converting mechanical energy into electrical energy, which is beneficial for students to understand the operating principle and inspire thinking. Allows To Connect To Circuit: This hand crank generator allows connection to a circuit, unscrewing miniature light bulb, and can be used for almost any experiment requiring up to 6.3 volts DC. Features: 1.Amazing handheld electricity generator! Create power without batteries! Great for classroom physics teaching demonstrations. 2.Simply turn the handle, the electricity generated makes the bulb bright. The faster you turn the handle, the more power you generate. 3.Made with a clear plastic casing, students can clearly see the motor, gears and wiring. 4.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 6.3 volts DC.  5.This science kit is perfect for demonstrating the energy transformed from mechanical to electrical. Specifications: Material: ABS Material No-Load Output Voltage: 6.3V Output Current: 0.2A Storage Method: Well-ventilated, dry, indoor temperature preservation Light Bulb Replacement: 6.3V, 0.3A Miniature Light Bulb Weight: 178g(approx.) Package Includes: 1 x Generator Note: Please don't overexert in order to avoid damage of the gears, 2 rounds per second is recommended. Package List