Tri-Tek Electronics features the latest coaxial-based HD cctv camera technology - up to 5 MP resolution over standard coaxial cable! Most of our cameras are 4-in-1 technology and are compatible with existing HD-TVI, HD-CVI, AHD, or analog 960H (700 TVL) DVRs. So whether you are expanding or upgrading your cctv system, Tri-Tek Electronics can make sure you get the latest high resolution technology at the best pricing!