1 Low power consumption The electronic ink screen only consumes power when turning pages, etc. 2 flimsy The current e-ink screen is only 1.2mm thick. The thinner the screen, the more effective it is to reduce the thickness of the device and make it thinner. 3 visible under strong light Without reflection like the LCD screen, it looks better in places with strong light. 4 No flicker, no radiation, large viewing angle Traditional liquid crystal display screens will flash because they are constantly refreshed. Using a low-power controller and memory allows the entire system to be powered by a small button battery and can still operate for several years. Based on the built-in connection options (usually BLE or Wi-Fi), the on-board memory can double as the protocol stack storage space, bypassing the mall's central server and directly connecting to the user's mobile phone.