Features: 1. Frequency: 850/900/1800/1900 2.3.5-inch (diagonal) widescreen Multi-Touch display with 480-by-320-pixel resolution 3.Internal memory: 2GB support 8 GB. 16GB need add extra money 4.2.0 mp camera 5.Wi-Fi connectivity (802.11b/g) 6.Bluetooth version 2.0 + EDR with the following profiles: HFP (hands-free car kits), HSP (communication headsets) 7. Compass function 8.Audio formats supported: AAC, Protected AAC, MP3, MP3 VBR, Audible (formats 1, 2, and 3), Lossless, AIFF, and WAV 9.Video formats supported: H. 264 and MPEG-4 video in in. M4v, MP4, and MOV file formats 10.Mac system requirements: Mac OS X v10.4.10 or later; ITunes 7.5 or later; USB 2.0 port 11.Windows system requirements: Windows Vista (Home Premium, Business, Enterprise, or Ultimate Edition), or Windows XP Home or Professional with Service Pack 2 or later; ITunes 7.5 or later; USB 2.0 port Vital Statistics The weighs 4.8 ounces and measures 4.5 x 2.4 x 0.46 inches. Its lithium-ion battery is rated at up to 8 hours of talk time, up to 6 hours of Internet use, up to 7 hours of video playback, up to 24 hours of audio playback, and up to 250 hours of standby time.