Efreecity 30x Zoom 700TVL Sony CCD CCTV Speed Dome PTZ Security Camera fan&Heater Outdoor PTZ Dome Camera, with a performance of 30x Optical Zoom and 700TV Lines, Also with 16 preset positions, wheather proof and home guard postion. 360paning and built-in housing Built-in high quality heater and fan & OSD Menu Support 16 preset positions :1 tour group (16 presets can be included) Left&right Scan, Auto scanning or cruising professional CCTV camera seller , quality and warranty guaranteed , ships directly from US ,arrive you in 2-5 days