【TEST, CALIBRATE, SERVICE, TROUBLESHOOT TV AND NTSC MONITOR】 Handheld video test pattern generator that generates a wide variety of test patterns for comprehensive testing, calibration, and repair of TV, NTSC monitor, and other video equipment | 【WIDE SELECTION OF TEST PATTERNS】 8 commonly used video test patterns including COLOR BARS, CROSS HATCH, DOT, STAIRCASE, CIRCLE, CENTER CROSS, WINDOW, and RASTER (choose from White, Yellow, Cyan, Green, Magenta, Red, Blue, and Black) | 【VERSATILE AND INTELLIGENT DESIGN】 Microprocessor generated and controlled accurate video outputs; single push button selectable patterns with hold down reverse | 【EASY TO USE, LIGHTWEIGHT, PORTABLE, AND AFFORDABLE DESIGN】 Delivers the quality and functionality of an expensive high end NTSC pattern generator at fraction of the cost; AC adaptor operation or standard 9V battery operation; Ideal for on-the-bench and in-the-field testing | 【DESIGNED AND ENGINEERED IN THE USA】Designed in the USA; Peace of mind support and warranty in the USA