Surveillance Digital Video Recorder 16CH HD-TVI/CVI/AHD H264 Full-HD DVR 1TB HDD HDMI/VGA/BNC Video Output Cell Phone APPs for Home/Office Work @1080P/720P TVI&CVI, 1080P AHD, Standard Analog& IP Cam

101AV 16CH Security System Hybrid HD H.265/H.264 5in1 DVR/NVR, HD-TVI/CVI/AHD/IP, 1TB HDD, 1080P HDMI/VGA Video Out, Phone APPs for Home & Office, Work w/ 5MP Lite Analog & 8MP Lite IP Camera (no PoE)

Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ

Seagate Skyhawk AI 8TB Video Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 256MB Cache for DVR NVR Security Camera System with in-house Rescue Services (ST8000VEZ01)