1) Indoor medium speed dome 2) CE,FCC etc 3) subwoofer noise,no image dithering 4) 60 presets,patrol,auto scan 5) RS-485 Key features:1) Imported Acrylic out-cover and delicate design, black inner shell can monitor much sharper.2) Be compatible with common cassette mechanism of camera, like SONY, HITACHI, LG and other famous brands with high resolution.3) Running smoothly with low speed, ...