Function MP3 player USB data storage Voice recorder Sapphire crystal glass Day and week dual calendars Multifunction Japan movement Shockproof without sound jumping Water-resistant Supports MP3/WMA formats More then 7 hours continuous playing after fully charged Technical parameter Memory unit build-in 128MB-1GB flash memory Port round 4 Pin USB port Battery build-in Hi Li-ion rechargeable 150mAh/3.7V Transmission USB 1.1 (max. 5Mbps) Compression rate 32Kbps-320Kbps Record frequency 44.1KHz Output frequency rate 20Hz-20KHz Record time 260 minutes (128MB) Earphone output 5mW+5mW Operation platform Window98/Me/NT/2000/XP Suit content MP3 quartz watch MP3 quart watch user manual 4 Pin USB port Stereo earphones CD driver 1pc convertor Warranty card