Check the listing for details. Soldering Practice Board, 4 Set Electronics PCB Board DIY LED Rotary Gyroscope. Condition: New. Listed at 15.45 USD. This LED rotary gyroscope soldering kit electronics practice board is a teaching kit for people who want to improve the welding skills.An interesting DIY welding kit that can be used as a gift.Specification:Product:Electronic Production Teaching KitApplicable voltage: 6VDiameter: 52mm/2 inchEffect: LED Rotary GyroscopePacking List: 4 Set DIY Electronic Experiments Teaching Kit(1Set Packing List: 2 * Ceramic capacitor 104, 2 * knurled copper column, 1x M2*4mm, 1xM2*18mm)Advantage :1. The pcb board prototype kit is tinned, not easy to oxidize, high-strength fireproof, anti-drop material, can be disassembled and assembled repeatedly.Can improve the welding skills of electronic professionals and enthusiasts.2.Bright LEDs show a straight line when you rotate the top.