The FNIRSI 2D15P 3-in-1 handheld oscilloscope is an all-in-one measurement device designed for professionals and hobbyists needing accurate waveform analysis, multimeter functions, and signal generation. Its compact design integrates a digital oscilloscope with 100MHz bandwidth, a multimeter capable of measuring AC/DC voltage, current, resistance, capacitance, and diodes, along with a DDS signal generator supporting multiple waveforms. Featuring a 4.3-inch capacitive touchscreen combined with physical buttons, the device offers intuitive operation and enhanced usability. Thanks to its high sampling rate of 500MS/s and extensive waveform memory, it ensures precise data capture for complex troubleshooting or testing scenarios. The robust design includes built-in rechargeable batteries and supports various measurement tasks, making it suitable for automotive diagnostics, electronic circuit testing, and signal analysis.