... /900/1800/1900(Tri-band 900/1800/1900 option)2, Windows mobile 6.13, WIFI 802.11b/g4, Bluetooth 2.05, ... MP3, WMA, WMV, AMR, AVI, ASF, WMV, MPEG4, 3GP7, Support install any programs at windows mobile8, Slide to unlock9, Battery: 2pcs 1800 ... mAh 10.2.8 Inch LCD TouchFLO Additional featuresOperating System: Windows Mobile 6.1 ProfessionalLanguage: Simplified Chinese, English, some other languages ...