Quickly shake the handle, the high-speed motor emits a small DC current, and the red small lamp beads. This kit is a good demonstration of the conversion between mechanical energy >> electrical energy >> light energy. Each bag comes with 2 red small lamp beads, no longer afraid that the bulb is lost.

[Size]: Length 4.8 cm, width 3 cm, height 7.5 cm

[Weight]: About 33 grams

[Accessories]: LED, gearbox, plastic, etc.

[Principle]: Mechanical Energy>>Electric Energy>>Light Energy