Features:5-Channel Input Design: Sync 5 channels, suitable for long-term monitoring and archiving of the operating conditions of electrical equipment.Oscilloscope Function: Automatic amplitude measurement, 4 kinds of measurement modes can be selected by yourself. With time and frequency measurement, automatic top-measurement, and frequency measurement.Trigger Function: Supports any channel rising-edge trigger and any channel falling-edge trigger.Multifunctional Design: With differential analysis, reverse display, custom display, and custom algorithm, display up to 90 hours of data.Auxiliary Function: Support spectrum analysis, with the screen ruler and white background for easy printing.Two Models Available: There are two models ET601 and ET602 for you to choose from, you can choose according to your demands. ET601 supports only USB communication, and ET602 supports both USB+WiFi communication.