About this item Function introduction: When the top is rotated, the vibration switch is turned on due to the centrifugal force, and the light-emitting diode emits light. Due to the persistence of vision in the human eye, it seems that the LED emits a segment of linear light effect. Working voltage: DC5V, PCB dimensions: 65mm*55mm Designed for Beginners£ºSpecial design for electronics starter to learn to solder electronics components. Soldering project kit will improve your electronic knowledge and soldering skills in practice Easy to Assemble£º Electronic DIY kits uses safety materials, effectively avoid corrosion and wear out. Components¡¯ names have been marked on the PCB board and the circuit design is simple. Even beginners can easily solder successfully Warm Reminder £ºDIY electronic components kit requires buyer to assemble and welding, If you don't have any soldering experience, please read the soldering instructions and use soldering tools carefully to avoid safety problem ? See more product details