Function introduction: When the top is rotated, the LED will emit a linear light effect due to the continuity of the human eye. Suitable for Beginners: Designed for beginners in electronics, for learning to solder electronic components. Soldering project kit will improve your electronics knowledge and soldering skills Easy to assemble: The electronic DIY kit uses safe materials, which effectively prevent corrosion and wear. The part names are marked on the PCB board, and the circuit design is simple. Even beginners can solder easily. Warm Tips: DIY electronic component kits need to assemble and solder, if you 't have any soldering experience, please read the soldering instructions and use soldering tools carefully to avoid problems [Working voltage]: DC 3V-6V note:The above picture, delivered in loose parts, need to be welded Material:plastic+metal colour:transparent Package Contents: 1 x Electronic Soldering kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.