Multi-function Portable 2.4 inch Display Screen E-book Calculator, Support Sound Recording Radio Music \u0026 Video Playing Picture Browsing 1. Material: ABSMetal 2. Battery capacity: 900 mAH 3. Standby time: 30 days 4. Charging mode: USB 5. Return one key to the calculator interface (e-book or video interface can return to the calculator state with one key) 6. Backlight brightness: 1-5 adjustable 7. Built-in memory, you can also insert another memory card. 8. Music Playing: Support WMA, WAV and other formats. 9. Image browsing support: JPEG, BMP, GIF format browsing 10. Video playback support: AMV, AVI format video playback 11. Support 24 languages: Simplified Chinese, Traditional Chinese, English, Japanese, Korean, French, German, Italian, Dutch, Portuguese, Spanish, Swedish, Czech, Danish, Polish, Russian, Turkish, Hungarian, Romanian, Arabic, Hebrew, Thailand Indonesia, Greece 12. Functions: recording, radio, text document reader, calculator, time and calendar display 13. Weight: 125 g 14. Size: 15.5x7.5x0.9cm