16 channels HD Digital Video Recorder with H. 265 video compression technology provides a complete security solution for your home and office network. The System Records professional quality widescreen video for up to sixteen cameras. Multichannel playback function as well as searching and downloading. 4TB Hard Drive memory storage is installed for recording. 2 SATA - one more hard drive can be added to increase the storage. Compatible with all 1080P, 960P, 720P ,TVI, AHD, CVI and Traditional Analog Cameras. Not Compatible with HD-SDI and Over 2.4MP Security Cameras. View live and recorded video on multiple devices, such as smartphone, tablet or PC. With the free Application, you can view your system on iOS/Android phone and you can also use a web browser or VMS Software on your PC to access your security cameras. Motion detection, Email alert function and USB Backup. One year warranty service and free technical support included.