1. MP3/WMA playback 2. Voice recording function 3. External voice recording, recording quality adjustable 4. LCD display 5. Support ID3 song info display 6. 5 EQ modes 7. Supports multi-language 8. Firmware update 9. Pen drive, USB plug and play without installing drivers for Windows ME or above 10.Repeat one/repeat all/A-B repeat 11.Random, intro, normal, play 12.Set time for power off 13.Built-in telephone book 14.Picture icon display 15.Custom logo 16.Weight: 42g 17.Memory: built-in 128M/256M/521MB/1GB flash memory 18.Power supply: 1 AAA battery support 8-hour playback