Main Features: Quartz watch with calendar + MP3 player + Recorder + USB flash memory disk + Line-in record + A-B repeat + High quality MIC + Frequency Modulation+ shock proof, static proof and water prof Main Specs: 1) High quality MIC record/A-B repeat /MP3 player /Cancel pre-file /Shock proof, static proof, and waterproof /USB flash /LINE-IN record /5-equalizer modes 2) MP3 Support format: MP3/WMA/WAV 3) Bite rate: 32kbps-256kbps 4) Temperature: -2 º C to +7 º C; 5) Output frequency rate: 20Hz~20KHz 6) Earphone output: 5MW+5MW 7) Port: USB2. 0 8) Operating platform: Windows98/2000/xp/me/nt Mac OS 8. 6 or higher 9) Battery pressure: 3. 7V Charge pressure: 5. 1V 10) More than 9hours continue playing. 11) Charge time: Abt 1. 5hours (you should charge 4hours in the first time)