- Complete signal generator set with USB cable included; designed to work with HDTVs, LCD monitors, and CRT projectors, providing a practical tool for diagnosing display issues. - Four resolution modes: 640x480, 800x600, 1024x768, and 1280x; each mode can be powered by a 9V battery or an external AC adapter for flexible use. - User-friendly operation: connect to the display via the 15-pin connector and select the desired signal; a default color block diagram appears on startup for immediate testing. - Compact and lightweight design: dimensions 26mm x 52mm x 90mm; easy to transport and store, suitable for technicians or home users needing quick diagnostics. - Practical use scenarios: on-site troubleshooting for customer displays; testing and configuring home theater setups; classroom or lab demonstrations of video timing and resolution testing.