Main function: recording video and audio at the same time, clock, USB drive Video format: AVI, 640 x 480 pixels resolution Internal memory: 2GB/4GB/8GB USB interface: 2.0 (HS) Charging time: 2 to 3 hours Battery use time: built-in lithium battery, can work continually about 1-2 hours QuickTime player, KMPlayer, Mplayer Operation systems: No need for driver installation if the operating system is Microsoft Windows ME/2000/XP/Vista or above (Microsoft Windows98 is excepted) Product accessories: Clock camera USB cable User manual CD Charger Clip Packing and shipping: 1pc/gift box = 0.26kg Gift box: 15 x 10 x 4.5cm, 100 boxes/carton Carton size: 53 x 33 x 25cm Gross weight: 27kg Net weight: 26kg