FNIRSI 2C23T 3IN1 Digital Oscilloscope Multimeter DDS Generator

Our review of the FNIRSI 2C23T finds it a practical, all-in-one test instrument for hobbyists, educators and field technicians who need a compact bench tool. The bottom line: it combines a two-channel handheld oscilloscope, a 10000-count multimeter and a DDS signal generator in a single portable unit, making it the best buy for users who value space, battery operation and waveform export more than top-end laboratory bandwidth. For routine electronics troubleshooting and teaching labs its feature set and price make it a sensible choice.

Key Features

• Two-channel oscilloscope: 10 MHz bandwidth and 50 MSa/s sampling rate provide clear visualization of common analog signals for debug and verification work.
• Multimeter functions: 10000 counts with wide ranges for AC/DC voltage, DC/AC current, resistance and capacitance makes it useful for most electrical testing tasks.
• DDS signal generator: Outputs up to 2 MHz with seven waveform types so you can stimulate circuits with sine, square, triangle and other waves for response testing.
• Portable hardware design: FPGA+MCU+ADC architecture, built-in 3000 mAh battery and a 2.8 in LCD let you work away from the bench for hours and capture measurement images.
• Data save and export: One-click save plus Type-C connection allows waveform image export to a PC for documentation or comparison of reference and measured traces.

Who It's For

This unit suits hobbyists, electronics students and field technicians who need a compact multifunction test tool for troubleshooting, lab exercises, and quick measurements without carrying separate instruments. It is also helpful in classrooms where budget and space are limited but a range of measurements is required.

Professionals needing high-bandwidth bench oscilloscopes or deep record lengths should look elsewhere; the 10 MHz bandwidth and 32 kb record depth are modest compared with dedicated lab scopes. Users who require precision lab-grade current measurement or extremely high sampling rates may find its limits apparent.

Pros & Cons

Pros

• Combines oscilloscope, multimeter and signal generator in one compact, battery-powered unit.
• Good measurement range on the multimeter side with 10000 counts and wide voltage/current limits.
• Convenient save and Type-C export for waveform documentation and side-by-side comparison.
• FPGA+MCU+ADC design and built-in protection improve reliability in hobby and education use.

Cons

• 10 MHz bandwidth and 50 MSa/s sampling are adequate for many tasks but not for high-speed digital or RF work.
• Some users report mixed functionality, so firmware quirks or user interface limitations may appear in certain workflows.

Specifications

Oscilloscope channels	2
Bandwidth	10 MHz
Sampling rate	50 MSa/s
Record depth	32 kb
Multimeter counts	10000
Signal generator max frequency	2 MHz
Battery	3000 mAh Li-ion (Type-C charging)

Our Verdict

The FNIRSI 2C23T is a solid value for its price, delivering a versatile 3-in-1 tool that covers most hobbyist, educational and light field testing needs. Buy it if you want portability and multiple functions in one instrument; skip it if your work demands high bandwidth or lab-grade precision.

Frequently Asked Questions

Can the oscilloscope save waveform images?
Yes, it has a one-click save function and you can export saved images to a PC via the Type-C port.

What waveforms does the signal generator produce?
The DDS generator outputs sine, square, triangle, full, half, noise and DC waveforms up to 2 MHz.

How long does the battery last?
The built-in 3000 mAh Li-ion battery offers standby time up to about 6 H depending on usage and display settings.