M21 Button Version 1.77 inch Novel Reading MP3 E-Book Without Bluetooth, Memory Capacity: 4GB 1. Screen material: Glass 2. Mirror material: PC plastic 3. Display: 1.77 inches 4. Leather screen type: TFT color screen 5. USB interface: USB 2.0 6. Headphone jack: 2.0mm 7. Battery capacity: 200 mA 8. Recording format: WAVMP3 9. Music format: MP3WMAWAVAPEFLAC 10. Bluetooth version: Bluetooth 4.0 11. Support English-Chinese dictionary translation 12. Support memory card expansion 13. Multi-format video can be played 14. Rich vocabulary, easy to learn English, more efficient spelling 15. Loudspeaker loudspeaker, high-quality HIFI sound effect 16. Intelligent full-screen reading of e-books, bookmarks can be saved, 8-level variable speed playback, four kinds of reading backgrounds can be replaced, intelligent A-B reading 17. Lightweight back clip type, convenient to carry and use 18. Supported languages: Czech, Greek, English, Danish, German, Spanish, French, Italian, Hungarian, Dutch, Norwegian, Polish, Portuguese, Russian, Slovak, Finnish, Swedish , Turkish, Simplified Chinese, Traditional Chinese, Japanese, Korean, Hebrew, Arabic, Romanian, Indonesian, Croatian, Slovenian 19. Dimensions: 51x41x16.6 mm 20. Weight: about 120 grams including accessories Packing list: 1. Main unit x 1 2. Packing box x 1 3. Earphone x 1 4. Data cable x 1 5. Warranty card x 1 6. Manual x 1