GSM 900/1800/1900 or 850/1800/1900MHz Windows CE 6.1 upgraded O/S system With ARM 9 duo CPU, the CPU speed is over 400MHz AND 128 ROM + 128 RAM Screen parameter: 320 x 240, 262K TFT 2.8-inch with Touch Screen Dimensions: 113.7 x 61.6 x 18.6mm Format: GPRS class 12 Support Wi-Fi 802.11 b/g 54Mbps and GPRS data service for Internet Polyphonic: 64 polyphonic Phonebook: 500PCS Message: SMS/EMS/MMS/e-mail Built-in SKYPE and MSN functions video on talking via Wi-Fi Supports word/excel/PPT/outlook express/PDF/JPG function Supports 500M + 130M dual camera and photo view PRO editor with over backlight alarm function and automatic fix over backlight function Supports IPTV function and you can watch IPTV programs including BBC anywhere Supports high quality voice Microphone and receive function Supports dual speaker stereo audio out Supports T/F card, USB Supports cable mouse and keyboard Supports IE browser 90 degrees transfer for easy content read Red/black incoming call list function Support to TF card to refresh the new software program including Windows bulletin software With free of charge Support 4G TF card Supports to PC sync program Support 110V AC and 240V AC Standard accessories: Two pieces of 1, 800mAh battery pack One 2G byte TF card 3-in-1 charger One leather case for protection 1 cable mouse One USB transfer cable One USB charge cable One transfer cable for audio system or headset Users manual and Windows PC sync. Program disc