This 4K 4 Channel PoE NVR: DS-7604NI-K1/4P from Hik-v-ision factory, International Original English Version, not U.S. Version. Support upgrade firmware. Compatible with other third-party network cameras. | Up to 4K 8MP high-definition live view, storage and playback. Up to 1-ch@8 MP/3-ch@4 MP/6-ch@1080p decoding capacity. Up to 40 Mbps incoming bandwidth. | Embedded Plug & Play with 4 independent PoE network interfaces, 4 chanels ip cameras can be connected. H.265+/H.265/H.264+/H.264 video formats. | 1 HDMI and 1 VGA interfaces: both interfaces support independent video output. 1 SATA interfaces for HDD connection (Up to 6 TB capacity per HDD, HDD Not Include) | Provides highly configurable Home/Business Surveillance Live View, Storage, and Playback system solution. Including Mobile Viewing & Push Notifications, Desktop Web Browser support, Motion Detection. We will provide 2-year warranty and professional tech support. If you have any questions, please do not hesitate to contact us.