Flash disk watch with recording function, supports MP3/WMA format, watch USB flash drive Capacity: 512MB to 8GB Information: Portable and user friendly Patented MP3 watch Supports recording function Supports a-b repeat function Supports MP3/WMA format Memory unit built-in 64MB to 4GB flash memory Port round 4-pin USB port Built-in hi Li-ion rechargeable battery (3.7V) Dual charging methods: USB cable AC adapter/transformer Shock-resistant without sound jumping Red, green, and yellow light indicator Technical parameter: Battery life about 5 hours continuous playing when fully charged USB transmission rate USB 2.0 (high-speed) MP3 compression rate: 32 to 256kbps Record frequency: 32kHz Recording time: 260 minutes (128MB) Output frequency rate: 20Hz to 20kHz Earphone output: 4 and 4mW(16) Operating platform Microsoft Windows 98, ME, NT, 2000, and XP