FNIRSI 138 Pro - 2.4" TFT 2.5MS/s High Sampling Rate|200KHz Bandwidth|Digital Handheld Oscilloscope

One-key automatic adjustment: One-key automatic (AUTO) setting of all parameters, fast waveform measurement. Long press the AUTO button to quickly calibrate the baseline With full trigger function (single, normal, automatic): Automatic trigger: test periodic analog signal. Single trigger: test sudden aperiodic signal. Normal trigger: test digital logic signal Self-contained PWM square wave output: Frequency range: amplitude 3.3v square wave 0-80khz duty cycle 0-100%. The oscilloscope has a real-time sampling rate of 2.5MS/s and a 200KHz bandwidth The display is equipped with a 2.4-inch high-definition LCD screen with a resolution of 320*240. Built-in 1250mah high-quality lithium battery, a full charge can be used continuously for about 5 hours