Service: We offer 1 Year Warranty. US local office can quickly respond and provide technical support. 2TB HDD & H.265 Coding: 16 Channel DVR comes with a Pre-Installed 2TB Surveillance Hard Drive, H.265 coding offers longer record time, saving more storage space than H.264 systems. Plug and Play - Real HD DVR transmits video, audio, and controls over a single coaxial cable. Utilizes existing coaxial cable networks, reducing the need to run new cables to your security system. 2MP 1080P HD hybrid security DVR: It is a full featured hybrid digital video recording system designed for use with 2MP Cameras, do not support 4K Cameras. Powerful 5-in-1 Hybrid DVR: Real HD digital video record combing the features of DVR & NVR, supports 16ch analog camera with up to 8ch IP cameras. Meet all the needs of the customer, no matter whether you use AHD/CVI/TVI or IP cameras. It is highly recommended that this DVR works with our brand Real HD wired cameras to achieve optimal performance. It also has good compatibility with HIKVISION TVI camera.