EDSR400H is the first digital video recorder for professional use that has real-time digital recording for security surveillance. It can record at speeds up to 60/50 images per second with NTSC/PAL formats, respectively, and replay event instantly. The EDSR400H incorporates all the benefits and operates just like a VCR. The highly efficient compression technology, as well as the superior clarity and detail of recorder images, make the EDSR400H stand out from its competitors as the best choice for security surveillance.