Comprehensive Learning Tool: Includes 16 types of common components, complete schematics, and simulated testing questions for skill assessment ideal for competitions, exams or auto paced electronics education Multi Functional Training Board: Designed with three component column and testing points on both sides, including a measurement ruler for precise component parameter checks during soldering practice meeting strong Platform: Made with 4 tin plated international standard PCB ( 89x58mm) featuring blue solder; components are numbered for adjustable parameters and allow repeated desoldering / reuse Professional Soldering set: This premium electronic set features 149 components and 274 solder points, perfect for enhancing welding skills through practical training with rotating LED light effects when powered ( 3 12V Intelligent Circuit Design: The built in smart detection systems instantly indicates proper solder connection when powered, while the unique 10 channel rotating light pattern adds engaging visual response, Manufacturer: TQUXNGA