Description This is an assembled hand-cranked generator model that can be disassembled with tools to give students a better understanding of the model's construction. Through this DIY package, they can exercise their own hands, thinking, exploring, creating ability, build a project model that lights up the LED by hand and the drive motor to learn the principle of conversion between energies. Features - Color: Assorted color. - Material: Plastic, metal. - Size: 17.30X8.80X12.00cm/6.80X3.46X4.72 inch. - This is a portable, hand-operated emergency power generator. - High strength, corrosion resistance and durability, can generate electricity steadily. - Hand power generation is convenient to use and operate. - Lightweight, reasonable size, easy and convenient to move and store. - It is safe, no harm to human health. You needn't worry about its safety. Package listing: 1 x Hand Generator