Features: This 2.13-inch electronic ink screen is a versatile little gadget, perfect for electronic badges, digital photo albums, workstation nameplates, and more – easily customizable at any time. Upload and display images directly via Bluetooth on your phone, offering a range of inspiring options. It can be powered by two 2450 button batteries, providing an impressive standby time of up to 8 months. Even without power, the display remains persistent. Smart connectivity, simple control: Featuring advanced Bluetooth 5.0 technology, no extra base station is required – connect directly via mobile Bluetooth. Customized experience: Personalize, edit, and update display content through our app. Whether it's price tags, conference room door signs, or personal reminders, everything is under your control. Specifications: Item: 2.13 inch E-Ink Display Module Color: Black/white Batteries: Needs two 2450 button batteries (not included) Size: As pictures Bluetooth: BT5.0 Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to manual measurement. Package includes: 1pc 2.13in E-Ink ePaper Display