Parameter: 1. Bluetooth: 4.0 supports two-way transmission 2. Music player: support MP3, WAV, etc. 3. Recording support: FM MIC recording, the format supports MP3/WAV 4. Picture browsing support: BMP JPG format browsing 5. Video format support: MP4 format (need to be converted on the PC through the installation tool) 6. System support: Windows XP / Vista / Window 8 7. Operation mode: button type 8. Memory card type: TF card 9. Headphone jack: 3.5mm 10. Charging input: 5V/1A input 11. Screen resolution: 320 x 240 12. Menu language: Chinese, English and other languages 13. Functions: background music playback, FM radio, video playback, picture preview, high-definition recording, time, e-book 14. Battery capacity: 3.7v 250mah 15. Charging time: about 2 hours 16. Body material: environmentally friendly PV 17. Display screen: 1.8 inches 18. Interface: USB 2.0 19. Dimensions: 90.5 x 39.5 x 10mm 20. Net weight: 31g 21. Gross weight: 78g Features: 1. Document text reading support, multi-language support, Bluetooth receiving and sending support 2. High-definition professional recording function, listening to lectures/meetings/leisure/restoring every recording detail, 1536KBPS bit rate 3. Noise reduction recording chip, high-fidelity recording; stable microphone recording, high-definition long-distance recording 4. Convenient folder classification Create folders for your favorite idols, every time you play it is your favorite 5. Built-in speaker, super large external speaker without broken sound, large coverage area 6. The headphone jack is made of pure copper material to ensure smooth signal transmission, thick and warm sound audio technology; the headphone, speaker, and Bluetooth can be switched freely 7. FM radio preset station, manual tuning 8. Multifunctional e-book, four practical functions just to give you a better reading experience (adjust font size, change 4 background colors, bookmarks, support TXT e-book reading