Universal security DVR designed for use with 2MP/5MP HD TVI, AHD, CVI, RS485 PTZ, analog and IP cameras. For optimal performance, use this DVR with TIGERSECU security cameras. This DVR does not include a pre-installed hard disk drive. 32TB storage capacity. For continuous local recording, install up to 2 surveillance hard drives of up to 16TB each. Compatible with WD Purple, Toshiba and Seagate surveillance hard drives. This DVR does not work with external hard drives. Remotely access and play surveillance footage and control the security DVR with no contract or monthly fees with TIGERSECU's HD Viewer. For optimal performance, 1 Mbps upload speed is recommended for each 1080P camera. Bitrate settings can be adjusted in the DVR to accommodate slower network speeds. Mobile app requires iOS 9.3 or later and Android 9 or later. Compatible with iPhone and iPad. High efficiency video compression enables you to record more footage for the same storage space. No fan noise and a quieter system with our unique heat sink fan technology that enables the DVR to self-cool and prevent overheating. 4 audio inputs for audio recording on 4 channels (channels 1 to 4) in addition to 16 channels of video recording. 3 monitor connections through HD-port, VGA and CVBS ports. 1920 x 1080 pixels DVR display resolution. Works with TV and computer monitors with a minimum 1080p resolution. Hard disk drive is not included in this 16 channel DVR. Option to install an internal surveillance hard drive for continuous local recording. Allows 2 internal surveillance hard drive of up to 16TB each. Compatible with WD Purple, Toshiba and Seagate surveillance hard drives. External hard drives are not suitable for use with TIGERSECU systems. This TIGERSECU Super HD hybrid security DVR is a full featured hybrid digital video recording system designed for use with up to 5MP HD TVI, AHD, CVI, and analog security cameras. For optimal performance, use this TIGERSECU DVR with TIGERSECU security cameras. Remotely access and play surveillance footage and control the security DVR with no contract or monthly fees with TIGERSECU's HD Viewer. For optimal performance, 1 Mbps upload speed is recommended for each 1080P camera. Bitrate settings can be adjusted in the DVR to accommodate slower network speeds. Mobile app requires iOS 9.3 or later and Android 9 or later. Compatible with iPhone and iPad. High efficiency video compression enables you to record more footage for the same storage space. No fan noise and a quieter system with our unique heat sink fan technology that enables the DVR to self-cool and prevent overheating. 4 audio inputs for audio recording on 4 channels (channels 1 to 4) in addition to 16 channels of video recording. 3 monitor connections through HD-port, VGA and CVBS ports. 1920 x 1080 pixels DVR display resolution. Works with TV and computer monitors with a minimum 1080p resolution.