Esky C5900 Wireless IP Camera H.264 Video Compression, IR-cut ,Built-in DVR ,3.6mm Wifi Audio ,Night Vision, Micro SD Slot Supports H.264 video compression formats (video codecs) making video footage clearer, smaller and smoother. Infrared night vision lets you see in complete darkness, and turns on automatically in low light. Full-fledged surveillance management PC software included(One-stop management center managing up to 81 devices). You can save up to 15 preset positions (pan & tilt positions) of the camera, and up to 11 rotation speed classes Compatible Operating Systems:Microsoft Windown 98 SE / ME / 2000 / XP, Vista, and Windows 7