Swann 16 Channel 3MP HD Home Security NVR, 3TB HDD, Swann 7090 Series (Expand with Swann 1HD-835 Cameras) - (CONVR-B163MP-US) The NVR is capable of recording in 3MP Super HD on all 16 channels. The NVR allows you to see live full screen video and playback in rich high definition with video 20 times sharper than most traditional DVRs and NVRs. Each channel is also independently configurable so that you can record for longer, and the H.264 video compression allows for optimized, fast, efficient recording and playback. A massive 3TB hard drive, designed especially for surveillance, is pre-installed to allow recording for up to 45 days (based on 15% motion events at lowest settings).