FNIRSI-2C23T is a compact handheld 3-in-1 instrument that combines a 2-channel oscilloscope, a 4-digit digital multimeter, and a signal generator in one portable unit. It is designed for professionals, factories, schools, enthusiasts, and families who need versatile testing on the go. Oscilloscope mode - 2 channels, 10 MHz bandwidth, real-time sampling 50 MSa/s, record depth 32 kb - Voltage measurement up to ±400 V - Auto measurement, trigger auto/normal/single - Vertical sensitivity 200 mV/div to 10 V/div - Waveform storage and export for later analysis Multimeter mode - 4-digit 10000 counts - AC Voltage: 0-750 V, DC Voltage: 0-999.9 V - DC/AC Current: 0-9.999 A - Resistance: 0-99.99 MΩ - Capacitance: 0-99.99 mF - Temperature: -55°C to 1300°C (-67°F to 2372°F) - Diode test and Continuity measurement Signal generator mode - Output up to 2 MHz, step of 1 Hz - Seven waveforms: sine, square, triangle, full, half, noise, and DC - Adjustable output frequency, amplitude, and duty cycle Power, display and durability - FPGA+MCU+ADC hardware architecture with built-in high-voltage protection - 2.8-inch 320x240 HD LCD display - Built-in rechargeable 3000 mAh battery, standby up to 6 hours - Type-C charging with 5V/1A adapter Use scenarios - Field service and maintenance: diagnose live equipment, capture waveforms from two channels, and verify signals with the built-in generator. - Educational labs and classrooms: demonstrate oscilloscope measurement, DMM readings, and signal generation in one device. - Prototyping and troubleshooting: test microcontroller projects, sensors, and circuits with precise measurements and repeatable test signals. FNIRSI-2C23T offers a compact, reliable, and versatile solution for on-site and in-lab testing without compromising measurement accuracy or functionality.