4.3 inches 480*800 touch screen. WMA, WAV, APE, FLA, AAC, OGG, AMR, AC3, MP2, DTS and MP3 formats support. FLV, MOV, DAT, MPG, MP4, PMP, MKV, VOB, AVI, WMV, ASF, RM, RMVB and 3GP formats support. JPG, BMP, PNG and GIG formats support. TXT eBook format support. Built-in speaker. Built-in mic with MP3 format recording. USB and HDMI interface. HD TV out. Built-in 1700mA rechargeable lithium battery. FM stereo with frequency from 87.0-108MHz. System required: windows ME/2000/XP/vista/7 Built-in calendar. Support English and Chinese. Input: AC110-240V