Digital kit with waveform storage that persists after power off: captured waveforms are preserved even when the device is powered down. DIY capable: observe the previous trigger waveform (negative delay) for insight into pretrigger activity. 2.4inch color TFT display with up to 1 MSPS sampling: this kit uses an ARM CortexM3 processor (STM32F103C8) and includes a 2.4inch color TFT display. It can be used as an ARM test development board. Note: due to lighting effects, monitor brightness, and manual measurement, there may be slight differences in color and size between the photos and the actual item. Thank you for understanding. Use scenarios: Electronics education and hobbyist signal capture: analyze waveforms and test triggers with persistent storage. ARM development and debugging: leverage the builtin display and STM32F103C8 as a compact development board for ARM projects. Pretrigger data analysis: study pretrigger activity using the observable previous trigger waveform feature to understand signal behavior before events.