7.5inch E Paper Display, Cordless Bluetooth EInk Screen 3 Color, Edit by APP, Built in 4000mAh Battery, Display Suitable for Offices Libraries Warehouses Supermarkets

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【Editable Electric Paper Screen】: When the electronic paper display is bundled with an APP, it combines the lightness of paper and the convenience of electronics. It can be used as a name card, meeting tag, electronic door sign, price tag, and visual conference agenda or planner. 【Retro Grainy Display】: Electric paper display features electronic ink capable of rendering images and texts in three colours with a vintage, grainy pattern similar to old newspapers or photos, supporting text, images, QR codes, and barcodes. 【Reflective Display, Visible from Any Angle】: The electronic paper display screen is made from electronic ink and reflects ambient light for enhanced readability. True to the principle of reflection, information on the display can be viewed from 180 degrees. 【High Contrast Ultra Clear Display】: Compared to an screen, the paper screen offers better contrast and glare display, rendering a paper like comfortable and clear viewing effect. Furthermore, the stronger the surrounding light, the clearer the display becomes. 【Energy Efficient】: Replacing traditional paper tags, this Cordless paper display is reusable, energy saving. With a built in 4000mAh battery, it can last for a whole year on a single , simplifying daily operations with high operational efficiency and easy setup.