Digital oscilloscopes have entered an epoch-making generation. Compact appearance, full touch screen, and abundant functions together make this exquisite oscilloscope a very powerful test and measurement instrument which tremendously facilitate engineers to solve complex challenges. This is the latest definition of the alluring- brand-new-generation oscilloscope defined by GW Instek. That is the reason why she is called the Angel of the Test and Measurement Industry. GDS-200/300 series oscilloscopes are equipped with USB storage function and can be positioned in portrait and landscape display. The recharging-battery design makes the series easy to operate for field operations. The GDS-200/300 series are applicable in laboratories, R&D, large electric system tests, power product tests, motor tests, solar power battery inspection and repair, and maintenance personnel who are always on field assignments. The GDS-200/300 series, with two analog signal input channels, have advanced and standard models which come with 70MHz, 100MHz and 200MHz bandwidth. The maximum sample rate per channel is 1GSa/s and memory depth is 5Mpts. GDS-300 series oscilloscopes are equipped with 50,000 counts DMM, and GDS-200 5,000 counts DMM which can simultaneously measure and monitor A.C. and D.C. voltage and current, and temperature. Trend plot in a long period of time can also be drawn that allows engineers to effectively monitor standard electric parameters while measuring basic circuit signals.