STM32F103C8 Microcontroller : The DSO138 Oscilloscope Kit Uses ARM Cortex-M3 Processor,and Includes a 2.4" Color TFT Display Screen,Can be Used as ARM Test Development Board. Various Digital Waveform Display : Including Frequency, Cycle, Pulse Width, Max/Min, Average, Peak Value and Effective Value,Can be Triggered by Rising or Falling Edges,Pefect for Arduino etc. HOLD Function : With Automatic,Conventional and Single Trigger Mode,Can Freeze at Any Time Waveform Display. Fully Assembled and Soldered Professionally : Has been Soldered All the SMD,Includes the Acrylic Case Kits which Need to be Installed by Yourself. Adjustable Vertical Displacement,and with Instructions,which Increase the Likelihood of Adding Different Features or Developing New Applications on the Hardware for Users.