Size: 37 x 22 x 2mm; Mainly used in DIY educational use, solar lawn light, solar wall lights, solar wall lights, solar crafts / toys, solar radios, small household lighting system / small solar system / self DIY / DC for a variety of small power appliances, emergency lights, advertising lights / traffic lights / home light / fan / solar small pump, etc.

It is Monocrystalline Epoxy board, with imported chip.