Four cameras provide full perimeter Bird's-Eye View; Add on 2 cameras for extra long vehicles or driver/cargo views ; Auto-calibration dramatically cuts down setup time; Out-of-the-box recording records onto 4 solid-state SD Cards (1TB total capacity); 1080P video output via 7" or 10" HD monitor; Automatic trigger switch (reverse/left/right/front); Customizable on-screen overlay for outrigger vehicles