... storage songs and data.6. All in One design Surface.7. Globalfunction LED indication.8. USB2.09. Loudspeaker output value,THD ... , use earphone about 70 hours.11. Charging interval,USB charge ,7 hours USB(5V/1A)AC transformer charge,4 hours.12 ... ,MP3 / WMA16. Reaction temperature,-18°C ~ 80°C17. Size,88 x 35 x 35 mm18. Weight,132g