Perfectly designed for on-site maintenance personnel, the multimeter supports 9V battery and USB power supply, light volume, convenient to carry. It can produce 15 different parameters and various resolution VGA signals, suitable for all types of different performance monitors. It is a simple and compact VGA/XGA color generator. -A unique and practical product for testing and adjusting VGA/SVGA/XGA display devices such as monitors, projectors, etc. In the four most common VGA resolution modes - 640x480, 800x600, 1024x768 and HV8-1,HV8-2,HV8-4 and HV8-8 Specifications: Voltage: 9V DC or USB power supply (not included) Output: Standard VGA/XGA RGBHV signal on HD15F connector (15-pin D connector) Resolutions: 640 x 480, 60Hz 75Hz. 800 x 600, 75Hz. 1024 x 768.75 Hz. Hardware: PC+Metal Color: as shown Package Contents: 1 x VGA signal generator LCD tester