Complete signal generator set with USB cable, designed to work with HDTVs, LCD monitors, and CRT projectors, providing a reliable tool for diagnosing display issues.<br> Four resolution modes: easily switch between four common settings 640x480, 800x600, 1024x768, and 1280x Each mode is powered by a 9V battery or an external AC adapter for flexible use.<br> User friendly operation: connect the generator to your display using the 15 pin connector and select your desired signal. The default color block diagram appears upon startup for immediate testing.<br> Compact and lightweight design: dimensions 26 mm x 52 mm x 90 mm, making it easy to transport and store for quick diagnostics.<br> Use scenarios<br> Field technicians performing on site diagnostics across various display devices to identify issues quickly.<br> Home users during setup or to verify signal compatibility between computer sources and displays.<br> Educators or presenters testing projectors and monitors in classrooms or conference rooms for reliable signal output.