1. Indicator light: Usually, when the indicator light is on, it indicates that the sampling is running, 2. There are three triggering modes: automatic mode, normal mode, and single mode 3. Trigger slope: The trigger slope determines whether the is on the rising edge or falling edge of the signal 4. Trigger level: For repeated signals, the trigger level can stabilize their display. For a single signal, the trigger stage can capture it 5. Save Settings: When exiting the settings interface, all parameters of the settings interface and the main interface be saved in EEPROM Waveform generator: PWM (PWM generator) and SIN (sine wave generator), adjust RP1 and RP2 to change the amplitude respectively Supply voltage: DC 5V(micro-usb) Voltage range: 0-30V (LSB needs to be adjusted) Level sampling: 10kHz 100us / Sec/:500ms,200ms,100ms,50ms,20ms, 10ms, 5ms, 2ms, 1ms, 500us, 200us, 100us Note: Installation guide not included, Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Colour:Photo Color Material:PCB Package Contents: 1 x DIY Mini Digital Oscilloscope Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.