1. MP3/WMA playback. 2. Voice recording function. 3. Built-in FM tuner, 20 preset radio stations. 4. External voice recording, recording quality adjustable. 5. LCD display. 6. Support ID3 song info display. 7. 5 EQ modes. 8. Supports multi-language. 9. Firmware update. 10.Pen drive, USB plug and play without installing drivers for Windows ME or above. 11.Repeat one/repeat all/A-B repeat. 12.Random, intro, normal, play. 13.Set time for power off. 14.Built-in telephone book. 15.Picture icon display. 16.Custom logo. 17.Size: 3.2 x 9.6 x 2.3cm. 18.Weight: 42g. 19.Memory: built-in 128M/256M/521MB/1GB flash memory. 20.Power supply: 1 AAA battery support 8-hour playback