Product: DSO 138 DIY Oscilloscope Kit Opening Source 2.4" TFT 1MSPS Pocket-Size Digital Oscilloscope Kit with DIY Parts & Probe, Handheld Pocket Electronic Learning Set, Assembled Vision (Welded)
Brand: DORHEA
Color: DSO138 weld
Specifications:
 Maximum Real-time Sampling Rate: 1Msps
 Accuracy: 12Bit
 Sampling Buffer Depth: 1024 bytes
 Analog Bandwidth: 0-200KHz
 Vertical Sensitivity: 10mV / Div - 5V / Div (1-2-5 progressive manner)
 Input Impedance: 1MΩ
 Maximum Input Voltage: 50Vpp (1: 1 probe), 400Vpp (10: 1 probe)
 Coupling Modes: DC / AC / GND
 The Horizontal Time Base Range: 10μs / Div - 50s / Div (1-2-5 progressive manner)
 Supply Voltage: DC 9V
 PCB Size: 117 X 76mm / 4.6 X 3in
 Screen Size: 52 X 40mm / 2 X 1.57in
 Tips:
 This kit is soldered ! 
 Package Included:
 1 X DSO 138 digital oscilloscope board
 1 X Probe
 3 X User Manual(English)

This DSO 138 oscilloscope circuit boards components are pre-soldered, no need soldered by yourself.
This oscilloscope board uses ARM Cortex-M3 processor (STM32F103C8), and includes a 2.4-inch color TFT display screen, can be used as ARM test development board.Can freeze at any time waveform display (HOLD function).Comes 1Hz /3.3V square wave test signal source.
2.4" Oscilloscope with automatic, regular and one-shot modes, easy to capture the moment waveform.Available rising or falling edge trigger.Observable previous trigger waveform (negative delay).
2.4 inch TFT handheld pocket-size digital oscilloscope with waveform parameter digital display, including frequency, period, pulse width, duty ratio, MAX./MIN./AVG./Peak-Peak/virtual values.Waveform storage function: will not lose the waveform after power off.
Partially open-sourced,the MCU has been programmed, adjustable vertical displacement,and with instructions,which increase the likelihood of adding different features or developing new applications on the hardware for users.

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