Usb flash disk Function description: 1fashion design 2support all functions of traditional watch 3support mp3/wma format music 4support a-b repeat 5support recording function 6shockproof without sound jumping 7build-in hi li-ion rechargeable battery 8red/green indicator light 9watch+mp3 player+usb disk 109-10 hours playing when full charged 11dual charging methods: A)usb cable B)ac adapter/transformer 12portable and user friendly Technical parameter 1spec: 128mb, 256mb, 512mb 2battery: 150mah, 3.7v hi li-ion rechargeable battery 3file type: mp3 (mpeg1/2, layer3)/wma, flash disk 4time charge: up to 2~3 hours 5time playing: 9~10 hours continue playing 6interface: round 4 pins usb 7bit rate: support 32kbps-256kbps 8usb: usb1.1/2.0 (max 5mbps) 9temperature: -20 ~ +70 centigrade 10frequency rate: 20hz~20k hz 11recording frequency: 44.1khz 12recording time: 260 minutes (128mb) 13out put: 5mw+5mw 14operating system: windows 98/me/nt/2000/xp/mac 8.6 or above Analog mp3 watch(stainless steel strap) : 110g/watch, 0.55kg/giftbox; 12*11.7*9.7cm/giftbox; 30 giftbox/ctn; 49*26.5*38cm/ctn; Nw : 16.5kg/ctn; gw : 18kg/ctn.