TIGERSECU's Super HD hybrid security DVR/NVR is a full featured hybrid digital video recording system. For optimal performance, pair this DVR with TIGERSECU security cameras. This security DVR works with 2MP and 5MP HD-TVI, AHD, CVI, and analog security cameras. Remotely access and play surveillance footage and control the security DVR with no contract or monthly fees with TIGERSECU's HD Viewer. Minimum recommended upload speed is 1Mbps per channel for remote connection; 8Mbps is recommended for 8-channels. Mobile app requires iOS 9.3 or later and Android 9 or later. Compatible with iPhone and iPad. Features a unique heat sink fan technology that enables the DVR to self-cool and prevent overheating, which means no fan noise and a quieter system. 4 channels of audio recording in addition to 8 channels of video recording. Supports 3 monitor connections through HD-port/VGA/CVBS ports. Hard disk drive is not included in this 8 channel DVR. Option to install an internal surveillance hard drive for continuous local recording. Supports 1 internal surveillance hard drive of up to 16TB (hard drive sold separately). Compatible with WD Purple, Toshiba and Seagate surveillance hard drives. (External hard drives are not suitable for use with TIGERSECU DVRs.) Motion detection options allow you to record only when motion is detected to save hard drive space without missing important events. H.265+ high efficiency video compression enables you to record more footage for the same storage space. This set includes one 8 channel CCTV security DVR without pre-installed surveillance hard drive, one 12V 3A 100V-240V power supply, remote control, USB mouse, and screws to fasten a surveillance hard drive (cameras and hard drive sold separately). TIGERSECU security DVR systems are backed by Lifetime Support and 2-year warranty provided by TIGERSECU.