... 20000 a variety of good market software to download for free Audio playback support format support MP3, WMA, ... , U disk, card reader, mutual sharing dataHDMI HDMI standard mini interfaceUSB USB2.0 high speedCharge small charger socket, DC5V ... .7 V pure cobalt lithium battery, endurance 4 hoursAccessories DC5V2A charger, USB line, OTG line, packaging, specifications, warranty CARDS 7 inch tablet pc mid ...