Record from and manage up to four cameras with the 4-Channel 4K UHD NVR (No HDD) from Hikvision. It is equipped with a SATA port that supports an HDD up to 6TB (available separately). H.265, H.265+, H.264, and H.264+ video codecs keep file sizes manageable while maintaining the best quality possible. Two-way audio communication is supported.Hikvision's  is a 4-channel embedded plug and play network video recorder. A new generation recorder developed by Hikvision independently, this NVR supports the new H.264+ intelligent compression which aims to reduce bandwidth and storage requirements by up to 50%. Additionally, this NVR combines multiple advanced technologies such as audio and video decoding technology, network technology and intelligent technology and features 4 PoE network interfaces for easy plug and play setup.Complete with HDMI/VGA outputs at HD1080P and supporting up to 8MP (4K) resolution recording NVRs offer complete HD surveillance experiences. This small reliable unit is best suited for domestic and smaller commercial installation.