Double sided 10.85 inch three color (black, white, red) E-paper, with a non dazzling, soft, and wide viewing angle visual experience. Adopting indoor photovoltaic technology, lithium polymer batteries are used for energy storage, and the configured photovoltaic cells can continuously collect energy and charge under indoor lighting. When the lighting intensity and time conditions are met, it can work continuously for a long time without the need for external supplementary electricity. It is an extremely low-carbon, energy-saving and environmentally friendly high-tech intelligent product.