Not just wok as normal usb flash drive but also a mini voice recorder,

USB Flash drive +Voice recorder/ Hidden recording
One switch operation. Easy to use.
Super high quality recording 128Kbps
Recording format  WAV
Recording time
4GB: about 70 hours
8GB: about 140hours
Built-in Memory: 4GB/8GB
Long battery time. About 15 hrs recording on a single charge