The DSO-TC3 is a versatile 3-in-1 multifunctional electronic tester that combines a digital oscilloscope, transistor and component tester, and signal generator in one compact device. Equipped with a clear 2.4-inch color LCD screen, it allows users to easily visualize waveforms, measure signals, and test a wide range of components such as transistors, diodes, resistors, capacitors, and inductors. The oscilloscope offers a sampling rate of up to 10 MSa/s and a bandwidth of 500 kHz, ideal for general electronics testing and circuit troubleshooting. Its built-in signal generator can output various waveforms including sine, square, triangle, and pulse signals up to 100 kHz, making it useful for circuit stimulation and analysis. The transistor tester automatically identifies component types and pin configurations, displaying parameters like gain, capacitance, and resistance on-screen. Compact, rechargeable via USB-C, and easy to carry, the DSO-TC3 is a practical tool for electronics enthusiasts, repair technicians, and students who need an affordable and portable all-in-one testing solution.