When you are shopping for an oscilloscope and signal generator, the choices can feel close together until you look at screen size, portability, and listed condition. The four FNIRSI models here split into distinct roles: one handheld multimeter combo, two dual-channel benchtop-style units, and a battery-powered portable. The right pick depends on the kind of work you do and whether a used unit fits your plan.
Quick take
The lowest listed price is on the 2C23T 3-in-1, which merges a multimeter, oscilloscope, and signal generator into one handheld package. The highest listed price is on the 7-inch 1014D, which pairs a large screen with dual-channel performance. In between, the 1014D with USB adds a probe and USB connectivity, while the DS215H brings a 3.5-inch IPS screen and a 1500 mAh battery to a portable design.
Listed price comparison
| Product | Listed Price | Price Bar | Key Specifications |
|---|---|---|---|
| FNIRSI 2C23T 3-in-1 Digital Oscilloscope Multimeter Function Signal Generator | USD 75.99 | 20 MHz bandwidth, 2 channels, handheld, with probe | |
| FNIRSI 1014D 100MHz Digital Oscilloscope, 2 Channel Oscilloscope 2-in-1 | 1GSa/s | USD 140.00 | 100 MHz bandwidth, 1 GSa/s, 2 channels, USB, with probe | |
| FNIRSI DS215H Oscilloscope Handheld Dual-Channel 2-IN-1 Digital Signal Generator | USD 86.99 | 50 MHz bandwidth, 250 MS/s, 3.5-inch IPS display, battery | |
| FNIRSI 1014D 7-inch LCD 2 Channel Signal Generator Digital Storage Oscilloscope H0V2 | USD 158.00 | 100 MHz bandwidth, 7-inch TFT LCD, DDS signal generator |
Decision matrix
| Product | Best For | Trade-off |
|---|---|---|
| FNIRSI 2C23T | Field work where you also want a multimeter and signal generator in one unit | Handheld form factor only |
| FNIRSI 1014D 100MHz | Students and DIY setups that can use USB connectivity | Listed as used |
| FNIRSI DS215H | Portable checks with a battery-powered oscilloscope | Screen is smaller than the 7-inch model |
| FNIRSI 1014D 7-inch LCD | Bench use with a large dual-channel display | Listed as used and packaging opened |
Product notes
FNIRSI 2C23T 3-in-1 Digital Oscilloscope Multimeter Function Signal Generator
The 2C23T is the only model here that includes a multimeter, so it covers three jobs in one handheld shell. Its dual isolated channels are designed to avoid interference between measurements, and the one-key measurement and trigger options make straightforward signal checks quicker. The 20 MHz maximum bandwidth is the lowest across the four products, which means it is best suited to lower-frequency audio, control, and repair tasks rather than high-speed digital work. The listing includes a probe and is marked as new, making it an easy all-in-one choice for someone who wants a starter instrument without a large bench footprint. If 20 MHz covers your signals, this is the most multi-function option on the list.
FNIRSI 1014D 100MHz 2-in-1 with 1GSa/s
This 1014D variant delivers 100 MHz bandwidth and a 1 GSa/s real-time sampling rate in a compact two-channel design. It is also a 2-in-1 unit with a DDS signal generator, and it adds USB connectivity, a probe, X-Y mode, 240 Kpts memory, and automatic measurement. The intended audience is students and DIY electronics. The main limitation is that the unit is listed as used, so you are looking at a pre-owned instrument rather than a new one. If you need 100 MHz bandwidth without moving to the largest display, this model offers a capable feature set for a desk or classroom setup.
FNIRSI DS215H Oscilloscope Handheld Dual-Channel 2-IN-1 Digital Signal Generator
The DS215H offers 50 MHz analog bandwidth with a 250 MS/s sampling rate, putting it above the 2C23T but below the 100 MHz models. It runs on a 1500 mAh battery, and its 3.5-inch IPS HD color screen keeps the package portable. The built-in signal generator provides 13 waveforms up to 50 kHz with 1 Hz step adjustment, and the waveform screenshot feature supports saving views for later analysis. The ±400 V peak voltage protection adds a practical safeguard for higher-voltage measurements. The trade-off is the smaller display compared with the 7-inch 1014D, and you do not get the multimeter function found on the 2C23T. For portable troubleshooting, this is a balanced middle option.
FNIRSI 1014D 7-inch LCD Digital Storage Oscilloscope with Signal Generator
The 7-inch 1014D is the largest-screen option here and carries the highest listed price. It still offers 100 MHz analog bandwidth across two channels, a 1 GSa/s real-time sampling rate, and a built-in DDS signal generator that supports 14 standard function signals plus a customizable chopping signal. The large TFT display is the main draw for bench work where you want to see waveforms clearly. The catch is the condition: this unit is listed as used, and the packaging was opened by a previous buyer. For buyers who are comfortable with that, the screen and bandwidth combination makes this the most display-focused model in the group.
Final recommendation by use case
- For an all-in-one field tool: The FNIRSI 2C23T is the right fit if you want a multimeter, oscilloscope, and signal generator in a handheld unit and your signals are in the lower-frequency range.
- For students and DIY work: The FNIRSI 1014D 2-in-1 with USB is a practical match when you want dual-channel performance with USB connectivity and can accept a used unit.
- For portable troubleshooting: The FNIRSI DS215H makes sense when battery power and a compact screen matter more than a bench-style display.
- For bench use with a large display: The FNIRSI 1014D 7-inch LCD is the best pick if you prioritize a large screen and dual-channel performance, and you are okay with an opened, used unit.
