The Moscilloscope 4.1 is a mobile oscilloscope powered by a Teensy v4.1 microcontroller. The Moscilloscope's mobile nature comes from its ability to accept battery power, and is housed inside a compact 85mm x 140mm x 40mm enclosure weighing under 7 pounds. The device features two channels, each capable of sampling -25V to +25V at a frequency of 200+ kHz. To interact with oscilloscope, users can use its two push-button rotary encoders, and two additional pushbuttons to navigate through an intuitive menu, and alter on-screen data. All inputs are interrupt triggered causing a low latency system. The Moscilloscope's function properties mimic industry-standard oscilloscopes with the ability to measure the peak-to-peak voltage and period of inputted waveforms. Additionally, time axis, voltage axis, and trigger voltage value adjustment are all possible to adjust the on-screen waveforms. All code was written in C++ in the Arduino Framework configured to run on the device's Teensy v4.1 microcontroller. The most notable accomplishment was making such a compact system. In the future, the main improvement would be the bandwidth of the system.