Features , elegant displayer with 128*64 dots mono oled , support mp3 and wma , ergononmic buttoms allow ease-of-use , floats , enabling quick recovery from the water , simply re-charging by the computer , up to 14 hours of mp3 playtime , friendly attach with goggles and waist belt , ipx-8 waterproof , under water 3 meter , fm radio , pedometer , swim fitness function , sportsapp function:download your sports data for sharing. Specifications , mp3 bit rate from 8k bps ~ 320k bps , wma bit rate form 5k bps ~ 320k bps , rechargeable li-polymer battery(3.7v, 180mah) , battery life:>14 hours , usb2.0 high speed , dimension: 65(l)x46(w)x17(d)mm , 65(l)x46(w)x25(d)mm (with clip) , weight: 35g Size:13*9.54.5cm Weigt:120g