Features and Benefits:Extensive library of Known Good Waveforms ,Waveform Auto Set Up On All 4 Channels Independent Ground On Each Channel – Allows For Clean Signal Without Interference Or Potentially Damaging Feedback High Quality Twist & Lock BNC Connectors Easy To Use Intuitive Interface Includes An Array Of Conventional Ignition Adapters Includes Ignition Set-Up Pre-Selects Ultra-fast Capture Of “Glitch” Occurrences With Advanced Triggers Built-in Square Wave Signal Generator Ensures Verification Of Accuracy & Calibration;"Introducing Launch X431 O2-1 Oscilloscope, an optional add-on module which turns your X-431 Throttle and X-431 PAD II into a 4 channel Lab Scope. By analyzing waveforms, a variety of faults on sensors, actuators, circuits and electronic control units can be discovered – saving time on vehicle diagnosis and cutting down on unnecessary parts replacement costs.Electrical signals and their waveforms can be recorded, displayed, compared and examined based on the following parameters: amplitude (the maximum voltage of a signal), shape (the form of the signal), pulse width (the duty cycle or time interval of the signal) and array (the repetition characteristics of the signal)."