Compact 15.7x9.4cm Solar Panel Teaching Tool for Classroom Solar Lessons

Monocrystalline Solar Panel Teaching Aid 157mm x 94mm for Science Class

For Outdoor Solar Education Panel Sample 15.7 x 9.4 cm No Power Output

Portable USB Solar Panel Teaching Aid for Outdoor Solar Energy Education Demo

Efficient 2V Solar Panel with High Conversion Efficiency for Teaching Purposes