FNIRSI 2D15P 3-in-1 Oscilloscope, Multimeter & Signal Generator — 100MHz Benchtop Scope (UK)

2CH 100MHz Bandwidth | 500MSa/s Sampling | 4.3″ Touchscreen | True RMS Multimeter | 10MHz Signal Generator | 5000mAh Battery

The FNIRSI 2D15P is a 3-in-1 benchtop oscilloscope, multimeter, and signal generator combining 100MHz bandwidth, 500MSa/s sampling, and a 19999-count True RMS multimeter in a single compact unit. Designed for electronics repair, hobby work, R&D, and educational use, it replaces three separate instruments with one lightweight device that costs less than a standalone scope. Available in the UK from Kunkune with fast Royal Mail delivery.

Key Features of 2D15P Multimeter

• 3-in-1 Instrument — Oscilloscope, Multimeter & Signal Generator: Replaces three separate bench tools with one device. The 100MHz dual-channel oscilloscope, 19999-count True RMS multimeter, and 10MHz DDS signal generator share a single screen and battery — saving bench space, budget, and power outlets.

• 100MHz Bandwidth with 500MSa/s Sampling: 100MHz single-channel bandwidth (50MHz in dual-channel mode) and 500MSa/s real-time sampling rate. Enough headroom to capture digital signals up to ~20MHz cleanly, debug embedded systems, analyse power supplies, and troubleshoot analogue circuits with confidence.

• 4.3″ Capacitive Touchscreen + Physical Buttons: Full touchscreen control for intuitive waveform navigation, combined with physical buttons for the actions you want tactile feedback on. The hybrid interface is faster than pure touch and more flexible than button-only scopes.

• Phosphor-Style Display with 128-Level Grayscale & Colour Temperature: 1200fps waveform capture rate with 128-level grayscale and colour temperature visualisation reveals signal dynamics and intermittent glitches that traditional scopes miss. Infinite persistence mode overlays waveforms to spot jitter, noise, and rare events.

• 10MHz DDS Signal Generator with 11 Waveforms: Built-in DDS function generator outputs sine, square, triangle, sawtooth, and 7 other waveforms up to 10MHz. Adjustable amplitude (0.1–3.0 Vpp) and duty cycle (0–100%) let you feed test signals directly into the circuit you’re measuring — no separate generator needed.

• 19999-Count True RMS Multimeter: Full-featured digital multimeter with True RMS measurement for AC signals. Covers DC/AC voltage (up to 1000V DC / 750V AC), DC/AC current (up to 9.999A), resistance, capacitance, diode test, and continuity. Higher resolution than most 6000-count handhelds.

• 5000mAh Battery with Type-C Charging: Runs untethered from the mains for hours of field or workshop use. The Type-C charging port works with any modern phone charger or power bank. At 30% lighter than the previous generation, it’s genuinely portable for on-site repair work.

Product Description

What the FNIRSI 2D15P Does

The FNIRSI 2D15P is a portable benchtop test instrument that combines three tools most electronics workbenches need separately: an oscilloscope for looking at waveforms, a multimeter for measuring voltage, current, and resistance, and a signal generator for feeding test signals into circuits. Instead of buying three instruments, finding bench space for all of them, and paying three separate prices, the 2D15P puts everything into one unit with a 4.3″ touchscreen and a battery that lasts for hours.

It’s aimed at electronics hobbyists, makers, repair technicians, small R&D labs, and students — anyone who needs capable test equipment without the cost or footprint of a full professional bench setup.

Why the 2D15P Specifically

The 3-in-1 oscilloscope category has several players, but the 2D15P stands out for a few reasons.

Real 100MHz bandwidth. A lot of budget scopes advertise headline bandwidth figures that fall apart under load. The 2D15P’s 100MHz single-channel / 50MHz dual-channel ratings are backed by 500MSa/s sampling — that’s a genuine 5x oversampling ratio at full bandwidth, which means clean waveforms rather than aliased mess. For digital signal work on microcontrollers, power supply analysis, and general analogue troubleshooting, this is plenty.

Phosphor-style display. The 1200fps capture rate combined with 128-level grayscale and colour temperature visualisation is what makes the difference between seeing a waveform and understanding it. Signal dynamics, jitter, and intermittent faults that look like clean traces on cheap scopes show up clearly on the 2D15P. Infinite persistence mode stacks waveforms on top of each other so rare events become visible over time — genuinely useful for finding that one-in-ten-thousand glitch.

All three instruments work together. The signal generator can feed a test waveform into the scope inputs while the multimeter measures voltage elsewhere on the circuit. All three share the same screen, battery, and power button. No cables running between separate instruments, no syncing clocks, no bench clutter.

It runs on battery. The 5000mAh internal battery and Type-C charging mean you can take it anywhere — field service, client sites, training environments, or just away from your desk. Most benchtop scopes are tethered to mains power and weigh several kilos. The 2D15P is 30% lighter than the previous generation and works for hours off a single charge.

What You’re Actually Getting

Dual-Channel 100MHz Oscilloscope. Two input channels with independent controls, 500MSa/s real-time sampling, and selectable memory depths (10K / 100K / 1M) to balance detail against capture duration. Vertical sensitivity from 10mV to 10V per division with max input of 800V using the included x10 probes. AC/DC coupling, rising/falling/both-edge triggering, and auto/normal/single trigger modes cover virtually every measurement scenario. 20MHz bandwidth limit option reduces noise when you’re measuring clean, low-frequency signals like power supply ripple.

Math Functions and Analysis Tools. Add, subtract, multiply, and divide operations between channels let you compute real-time derived signals — useful for differential measurements, power calculations, and comparing signals. 18 automatic measurements cover frequency, period, amplitude, rise/fall time, duty cycle, and more. Cursor measurement function gives you precise manual readings. XY mode displays phase relationships between two signals. Waveform export saves captured data for post-analysis.

19999-Count True RMS Multimeter. Higher resolution than the standard 6000-count multimeters most people own. True RMS measurement means accurate readings on distorted AC waveforms — essential for measuring switching power supply outputs, PWM signals, and anything non-sinusoidal. Full DC/AC voltage ranges up to 1000V / 750V, current up to 9.999A, resistance up to 19.999MΩ, and capacitance measurements from nanofarads to millifarads. Diode test and continuity with buzzer round out the feature set.

10MHz DDS Signal Generator. Built-in waveform generator outputs up to 11 common waveforms (sine, square, triangle, sawtooth, pulse, and more) from 0–10MHz with adjustable amplitude (0.1–3.0 Vpp) and duty cycle (0–100%). Feed test signals into your circuit, check filter responses, drive LEDs, test audio circuits — all without needing a separate bench generator.

FPGA + MCU + ADC Architecture. Under the hood, the 2D15P uses a dedicated FPGA for high-speed signal processing alongside the main microcontroller and ADC. This is why the 1200fps capture rate is achievable at this price point — the FPGA handles the heavy lifting without bogging down the user interface. The result is responsive operation even at maximum settings.

Curve View and Data Logging. Beyond the scope display, the 2D15P includes a curve view function that plots measurement trends over time — useful for monitoring drift, temperature effects, or any measurement that changes slowly. Combined with waveform save and export, this turns the 2D15P into a basic data logger for slow-moving signals.

What’s in the Box

✓ FNIRSI 2D15P 3-in-1 oscilloscope / multimeter / signal generator ✓ 2× P6100 oscilloscope probes (x1 / x10 switchable) ✓ Multimeter test probes ✓ Alligator clip probe set ✓ USB Type-C data/charging cable ✓ User guide

Recommended add-ons: A decent set of hook clips makes probing small SMD components far easier than crocodile clips. BNC test leads with alligator clips are useful for feeding the signal generator output into circuits under test. A soft carry case protects the unit if you’re taking it on-site regularly.

How It Compares

The 3-in-1 oscilloscope category has grown rapidly in the last few years, and the 2D15P sits in an interesting position.

Against dedicated entry-level benchtop scopes like the Rigol DS1054Z (~£300) or Siglent SDS1104X-E (~£350), the 2D15P trades some pure oscilloscope performance (build quality, user interface polish, software ecosystem) for dramatically lower price and the inclusion of a multimeter and signal generator. The Rigol and Siglent are better scopes — no argument. But they don’t replace your multimeter or generator, so the total cost of a complete bench is considerably higher.

Against the older FNIRSI 1013D (the previous-generation dual-channel 100MHz handheld scope), the 2D15P adds the touchscreen interface, the phosphor-style 1200fps display with colour temperature visualisation, integrated signal generator, and the 30% lighter build. If you already own a 1013D and it’s doing the job, the upgrade isn’t essential. If you’re buying new, the 2D15P is the better choice.

Against the OWON HDS series (another popular 3-in-1 handheld range), the 2D15P offers higher bandwidth at similar price points and a larger, higher-quality touchscreen. OWON has a longer reputation and slightly more polished software; FNIRSI counters with more features per pound.

For hobbyists, makers, small repair shops, and educational settings where a capable scope, a real multimeter, and a signal generator are all needed but a £700 total bench budget isn’t realistic, the 2D15P is hard to beat.

Best Use Cases

Electronics repair and diagnostics — troubleshooting consumer electronics, appliance repair, phone and laptop board diagnostics. The 3-in-1 design means you can measure a voltage rail, scope the ripple, and inject a test signal without switching instruments. Suitability: excellent.

Arduino, ESP32, and microcontroller projects — debugging digital signals, analysing PWM outputs, checking I²C and SPI communication, monitoring analogue sensor readings. 100MHz bandwidth is ample for microcontroller work. Suitability: excellent.

Power supply design and testing — measuring ripple, switching noise, regulator response, and transient behaviour. The 20MHz bandwidth limit removes high-frequency noise for clean ripple measurements, and True RMS multimeter readings handle non-sinusoidal outputs accurately. Suitability: excellent.

Hobby audio electronics — amplifier testing, filter response measurement, signal tracing through audio circuits. The 10MHz signal generator provides clean test tones, and the scope captures the response. Suitability: very good.

Educational and training environments — electronics classes, maker spaces, hackathons, and self-learning. Having one device cover three instruments means less confusion for beginners and less equipment to buy. Suitability: excellent.

Field service and on-site repair — the 5000mAh battery and portable form factor make this one of the few capable scopes you can actually take with you. Service engineers, solar installers, HVAC technicians, and audio-visual installers all benefit. Suitability: very good.

Hobby RF work (below 30MHz) — CB radio, amateur radio HF bands, crystal oscillators, basic RF circuits. The 100MHz bandwidth covers HF and low-VHF cleanly. Suitability: good.

High-frequency RF design above 100MHz — VHF/UHF circuits, higher-band amateur radio, microwave work. The bandwidth simply isn’t there. Use a dedicated spectrum analyser or high-bandwidth scope. Suitability: not suitable.

Professional compliance or precision measurement work — EMC testing, calibration lab work, anything requiring traceable accuracy and extensive software integration. Step up to Rigol, Siglent, Keysight, or similar professional-grade equipment. Suitability: not recommended.

Getting Started

The 2D15P is more or less plug-and-play, but a few tips make the first-use experience smoother.

Charge it fully before first use. The internal 5000mAh battery ships partially charged. A full Type-C charge takes a couple of hours and gives you the best battery life from day one.

Check the probe compensation. Each P6100 probe has a small adjustment screw near the BNC end. Connect the probe to the scope, probe the built-in compensation signal (usually a 1kHz square wave), and adjust the screw until the square wave has perfectly flat tops and bottoms — no overshoot, no rounded corners. Do this once per probe and they’ll give accurate readings across the full bandwidth.

Use x10 mode for most measurements. The P6100 probes switch between x1 and x10 modes. x10 gives you the full 100MHz bandwidth and the 800V maximum input rating; x1 limits bandwidth and voltage but doubles signal amplitude on screen. Default to x10 unless you specifically need x1 sensitivity.

The touchscreen + buttons hybrid is powerful — learn both. The touchscreen is faster for navigation and parameter selection; the physical buttons are faster for common actions like run/stop, auto-set, and single-trigger capture. Muscle memory develops quickly once you’ve used it for a few sessions.

Frequently Asked Questions

What can you actually do with a 3-in-1 oscilloscope like the FNIRSI 2D15P?

A 3-in-1 oscilloscope combines three separate bench instruments — an oscilloscope, a digital multimeter, and a signal generator — into one device. With the 2D15P, you can visualise electrical waveforms on two input channels at up to 100MHz bandwidth, measure voltage, current, resistance, capacitance, and continuity with the built-in 19999-count True RMS multimeter, and generate test signals up to 10MHz in 11 waveform shapes to feed into circuits you’re testing. It covers the core needs of electronics troubleshooting, repair, and prototyping in a single portable unit.

Is 100MHz bandwidth enough for Arduino and microcontroller work?

Yes, comfortably. Arduino and ESP32 projects typically run at clock speeds from 16MHz to 240MHz, but the signals you actually probe — GPIO toggles, PWM outputs, I²C, SPI, UART, and analogue sensor readings — are almost always well below 20MHz. A scope’s effective usable bandwidth is roughly 1/5 of its rated bandwidth for clean digital signal capture, so a 100MHz scope handles signals up to around 20MHz with faithful reproduction. That’s more than enough for virtually all hobbyist microcontroller work. The only time you’d want more bandwidth is for RF circuits above 30MHz or analysing the internal clock signals of faster microcontrollers directly.

Where can I buy the FNIRSI 2D15P in the UK?

The FNIRSI 2D15P is available from Kunkune — a UK-based electronics retailer shipping fast from Oxfordshire via Royal Mail, typically delivered in 1–2 days. Includes UK-spec accessories, 12-month warranty on FNIRSI products, 60-day easy returns, and free shipping over £25. No customs charges, no drama — order it and it arrives

The Bottom Line

The FNIRSI 2D15P is the bench instrument that replaces three separate tools on your workbench with one portable device at a fraction of the combined cost. The 100MHz dual-channel scope handles the vast majority of hobbyist, repair, and prototyping work. The 19999-count True RMS multimeter is more capable than most handheld meters people already own. The 10MHz signal generator covers function generator duties for audio, filter testing, and general signal injection. And the 5000mAh battery means you can take it away from the desk when you need to.

It’s not a Rigol or a Siglent — those dedicated scopes are better at being scopes. But for everyone who needs capable test equipment without buying three separate instruments and finding space for them, the 2D15P is a genuine one-box solution.

One device. Three instruments. One charger. One screen. Everything your bench actually needs.