Features: 2.13 inch electronic ink screen small ornament, can be used for electronic badges, electronic photo albums, workstation nameplates, etc. that can be replaced at any time. Images can be imported and displayed directly via Bluetooth-compatible on the phone, as well as various inspiring It can be equipped with two 2450 button batteries, providing a long standby time of up to 8 months. Even if the battery is removed, it can be displayed permanently without power. Intelligent connection, easy control: with advanced Bluetooth-compatible 5.0 technology, no extra base station is required, directly connected via mobile Bluetooth-compatible Customized experience: Customize, edit and update markings content through our app. Whether it's price tags, signs for conference room doors, or personal reminders, everything is under your control. Specifications: Item: 2.13 inch E-Ink Screen Module Color: Black/white Batteries: Need two 2450 button batteries (not included) Size: As pictures Bluetooth-compatible: BT5.0 Note: Due to the problems with 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