Provides a 1Hz / 3.3V square wave test signal source. Accuracy: 12bit Features a waveform parameter digital display, including frequency, period, pulse width, duty cycle, MAX./MIN./AVG./Peak-Peak/virtual values. Package Weight: 119 g / 4.21 oz PCB Size: 117 * 76mm / 4.6 * 3in Input Impedance: 1M Power Supply Voltage: DC 9V Sampling Buffer Depth: 1024 Bytes Package Size: 18 * 12.5 * 3 cm / 7.08 * 4.92 * 1.18in Coupling Modes: DC / AC / GND This kit utilizes an ARM Cortex-M3 processor (STM32F103C8) and includes a 2.4-inch TFT color screen, making it usable as an ARM test development board. This DIY kit is not yet soldered! Short circuit and open circuit detection: Helps users identify soldering errors. Maximum real-time sampling frequency: 1Msps TFT controller recognition function. Observable previous trigger waveform (negative delay). Allows freezing waveform display at any time (HOLD function). Adjustable vertical displacement with instructions. Vertical Sensitivity: 10mV / Div - 5V / Div (1-2-5 progressive mode) Screen Size: 52 * 40 mm / 2 * 1.57in Trigger available for rising or falling edge. Maximum Input Voltage: 50Vpp (1:1 probe), 400Vpp (10:1 probe) This DSO138 digital oscilloscope kit uses an ARM Cortex-M3 processor and a 2.4-inch TFT screen for reliable circuit operation. It displays frequency, period, pulse width, duty cycle, MAX./MIN./AVG./Peak-Peak/virtual values. Analog Bandwidth: 0-200 KHz Features automatic, normal, and single modes for easy waveform capture. Can be used for secondary development, such as conversion into a millivoltmeter or data logger. Waveform storage function: Preserves waveforms even after power off. Package List: 1 * DSO138 DIY Digital Oscilloscope Kit 1 * Probe 2 * User Manuals (English)