Three-Phase Permanent Magnet Brushless Design: High-efficiency three-phase permanent magnet brushless generator structure delivers stable output, reduced friction, and improved durability compared to traditional brushed generators. Educational Physics Teaching Model: Specially designed as a visual and practical teaching aid for physics classes, STEM courses, and science demonstrations. Clearly shows the conversion of mechanical into electrical , helping students understand basic principles of electromagnetism and power generation. Outdoor Emergency Power Supply: Compact mini hand crank generator designed for camping, hiking, and emergency situations, providing for mobile phones and small USB devices when no electricity is available., Manufacturer: Jnchdghwa