1. 2 Channel Digital Oscilloscope + Arbitrary/Function Signal Generator + Synchronizing Signal + External Trigger. 2. The keys for oscilloscope and signal generator is separated for convenient to operate it simultaneously. 3. Large and clear display (7 inch 64K color LCD screen, resolution up to 800x480), more clear and waveform. 4. Oscilloscope: 1GSa/s Sample Rate, 200MHz Bandwidth, over 20 kinds of auto measurement functions. 5. Powerful Trigger Function: Edge, Video, Pulse, Slope, Over time, Alternative. 6. Arbitrary/Function Signal Generator: 25MHz, 12 bits resolution, 200MHz DDS, arbitrary wave/square wave/sine wave/ wave/trapezoidal wave/pulse wave/DC, easy to simulate transducer. 7. Integrated with USB Host, support USB disk storage, USB interface/SD card system update.       Specifcations:           Brand     Hantek           Model     DSO4202S           Voltage     AC 100-240V           Plug Type     EU plug, US plug,AU plug, UK plug,(Optional)           Oscilloscope           Sample Rate     Sampling Rate Range: 1GSa/s           Equivalent Sample Rate: 25GSa/s           Acquisition Modes           Normal     Normal data only           Detect     High-frequency and randon glith capture           Average     Wavefom Average, selectable 4,8,16,32,64,128           Input           Input Coupling     AC, DC, GND           Inpit Impendance     1MΩ±2%, 20pF±3pF           Probe Attenuation     1X, 10X           Supported Probe Attenuation Factor     1X, 10X, 100X, 1000X           Maximum Input Voltage     CAT I and CAT II: 300VRMS (probe 10X)           CAT III: 150VRMS(probe 1X)           Installation Category II: derate at 20dB/decade above 100kHz to 13V AC at 3MHz* and above. For non-sinusoidal waveforms, value must be less than 450V. Excursion above 300V should be of less than 100ms duration. RMS signal level including all DC components removed through AC coupling must be limited to 300V. If these values are exceeded, damage to the oscilloscope may occur.