The Extech MS420 digital oscilloscope features 20 MHz bandwidth, 2 channels, and an auto‑set function that optimizes position, range, timebase, and triggering for stable display of virtually any waveform. Peak detect function for 50ns glitch capture, XY mode. Five automatic measurements: frequency, cycle, average, peak‑to‑peak, and RMS. Waveform math: add, subtract, multiply, divide. Average mode for smoothing, persistence mode for dynamic signals. Stores and recalls up to 4 waveform screens and setups.

True RMS multimeter functions include AC/DC voltage and current, resistance, capacitance, diode, and continuity. 320 x 240 pixel display (3.8″ LCD). 6K points per channel record length. USB interface and software for waveform transfer. Ships with probes, test leads, AC adapter, hard case, USB cable. 6‑hour lithium ion rechargeable battery.