--- product_id: 506601492 title: "FNB58 Standard USB Tester" brand: "fnirsi" price: "€ 96.59" currency: EUR in_stock: true reviews_count: 13 category: "Fnirsi" url: https://www.desertcart.fr/products/506601492-fnb58-standard-usb-tester store_origin: FR region: France --- # 16-bit ADC for precise voltage/current/power 2.0-inch TFT LCD display Supports QC2.0/3.0, PD2.0/3.0 fast charge protocols FNB58 Standard USB Tester **Brand:** fnirsi **Price:** € 96.59 **Availability:** ✅ In Stock ## Summary > ⚡ Power up your diagnostics with pro-grade precision and fast charge mastery! ## Quick Answers - **What is this?** FNB58 Standard USB Tester by fnirsi - **How much does it cost?** € 96.59 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/506601492-fnb58-standard-usb-tester) ## Best For - fnirsi enthusiasts ## Why This Product - Trusted fnirsi brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Crystal-Clear Visuals:** Vibrant 2.0-inch TFT LCD with auto-rotate for effortless data reading anywhere. - • **Precision Power Metrics:** 16-bit ADC captures voltage, current, power, resistance, and ripple with up to 4M sps sampling rate. - • **Universal Compatibility:** Integrated USB-A, Micro-USB, and Type-C interfaces cover all your device testing needs. - • **Smart Data Logging & Analysis:** Records capacity, startup time, cable chip IDs, and temperature for in-depth diagnostics. - • **Pro-Level Fast Charge Detection:** Automatically triggers and monitors QC, PD, VOOC, and other major fast charge protocols. ## Overview The FNIRSI FNB58 is a compact, multi-interface USB tester featuring a bright 2.0-inch TFT LCD display and advanced 16-bit ADC technology. It supports a wide range of fast charging protocols including QC2.0/3.0, PD2.0/3.0, VOOC, and more, enabling precise voltage, current, power, and resistance measurements. Designed for tech-savvy professionals, it offers detailed cable chip reading, ripple analysis, and smart data logging, all housed in a durable metal case. Ideal for engineers and enthusiasts who demand accurate, real-time USB power diagnostics. ## Description Product description FNB58 USB tester has a 2.0-inch full-color ultra-wide viewing angle TFT LCD display, integrated USB-A, Micro-USB, Type-C interface. FNB58 uses external 16-bit ADC, PD protocol physical chip, it can be used to test the fast charging protocol of chargers. FNB58 can be used to measure the power supply or power consumption of products such as USB interfaces, mobile phone chargers, and U disks. FNB58 can be used to measure the charging power of mobile phones and the input and output of mobile power supplies. Four Functional Curve Display Real-time voltage and current curve View the change of the charging curve in real time, find the abnormal charging immediately. Offline curve recording Supports up to 9 hours of offline voltage and current curve recording, charging process fully displayed. D+/D- voltage curve Charging protocols Changes. Master in real time. High-speed power ripple measurement Charger ripple measurement, easy to screen inferior chargers. Cable Detection Just Use FNB58 PD E-Marker Cable Detection Read data information of CC line with E-Marker chip DASH Cable Detection Read DASH cable chip related data Cable Interal Resistance Measurement Constant current load two-step fast measurement of wire resistance Review: Excellent USB-C cable and charger diagnostic - It's not perfect.. it has bugs, quirks, and inexplicable interactions, but --- once you figure out how to test the things that matter to you, it's very repeatable and clear. Specifically, it can read the Chip ID in USB-C cables, and show all the available power modes in USB-C PD, on a nice color built-in screen. That's nice. You can see the finer details of PD packet exchange as well, but this was less reliable. For testing batteries and other sources, it has a convenient "Trigger" function that can request any voltage or current from your supply, with a nice physical Switch that engages or disengages the "active" part. Switched off, the device is pass-through only and zero risk. Switched ON, you have a lot of direct control over voltage, and of course, risk. You want to put 20v on a USB-A socket? You can! I find the device is best to use when it's plugged into its own independent Micro-USB power source (5v, low current), because then it's not constantly turning off and on with your devices under test. It's easy to crash the device when messing with USB-PD packets, or even have it just beep nonstop until you pull power. The firmware could use some work. Some functions are duplicated or confusing (how many different trigger menus do you need?) but hey, it's affordable for DIY hobby work and comes in a nice well-made housing with an excellent screen for cheap. Unfortunately, the company web site is terrible, hosted on some Mediaflare thing that runs out of bandwidth, so downloading the firmware updates is way more hassle than it should be. They need to up their game, put up a professional site, and host their own files. Review: High quality, capable and great display - Pros: 1) Nice metal case with easy to use controls 2) Excellent, bright and clear display, with auto-rotate 3) Loads of technical capabilities 4) Nice storage box to keep the unit protected 5) Companion Windows app (NOT macOS) is nicely done, and turns this into a capable testing and measurement device. The only con is the documentation, which is a bit lacking. I had to go to YouTube to learn how to upgrade the firmware (which was necessary because the unit displayed incorrect temperature readings). All in all though, if you're reasonably technically savvy, there won't be any significant issues. Recommended! The manual and firmware are available at the FNIRSI website. ## Features - 【LCD Display USB Tester】FNIRSI FNB58 has a 2.0-inch TFT LCD display, integrated USB-A, Micro-USB, Type-C interface. It is a USB voltage andcurrent detection meter and a mobile communication terminal fast charging trigger with gravity sensor - 【Multifunction USB Digital Tester】FNB58 uses external 16-bit ADC, PD protocol physical chip. FNB58 USB tester can monitor the voltage, current, power, resistance, capacity, D+/D- voltage etc, it can be used to test the fast charging protocol of chargers - 【Fast Charge Protocol Trigger Detection】FNB58 supports QC2.0/QC3.0, FCP/SCP, AFC, PD2.0/3.0, VOOC/WARP, Super VOOC 1.0/2.0 trigger. The above protocols all support automatic monitoring. MTK-PE automatic detection. Support QC2.O->PD2.0 protocol conversion - 【Parameter Recording】The highest six-digit display of voltage, current and power. 10 sets of switchable capacity, power etc. Support low-speed waveform drawing, 2 sps-100 sps sampling rate. Support high-speed ripple drawing, up to 4 M sps sampling rate - 【USB tester detection function】The resistance measurement of the wire by the differential pressure method. E-Marker Cable chip reading. DASH Cable data reading. Record of startup time. Onboard temperature measurement. PD monitor. Analog DASH cable - 【Note】To support environmental protection and reduce paper use, the FNB58 does not include a printed manual. You can access the manual, firmware updates, and app information via the QR code provided in the packaging ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BS2ZS813 | | Best Sellers Rank | #178,596 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #134 in Voltage Testers | | Brand | FNIRSI | | Brand Name | FNIRSI | | Color | multi-color | | Customer Reviews | 4.4 out of 5 stars 177 Reviews | | Included Components | USB Tester | | Item Dimensions | 3.23 x 1.65 x 0.47 inches | | Item Weight | 1.6 ounces | | Item dimensions L x W x H | 3.23 x 1.65 x 0.47 inches | | Manufacturer | FNIRSI | | Measurement Type | Multimeter | | Minimum Operating Voltage | 4 | | Model | FNIRSI-FNB58-bp | | Part Number | FNIRSI-FNB58-bp | | Power Source | Battery Powered | | Specification Met | CE, FCC, RoHS, UL | | Style | FNB58 | | Style Name | FNB58 | | Upper Temperature Rating | 125 Degrees Celsius | ## Product Details - **Brand:** FNIRSI - **Color:** multi-color - **Item Weight:** 0.1 Pounds - **Power Source:** Battery Powered - **Style:** FNB58 ## Images ![FNB58 Standard USB Tester - Image 1](https://m.media-amazon.com/images/I/61r3ahYa0jL.jpg) ![FNB58 Standard USB Tester - Image 2](https://m.media-amazon.com/images/I/71BrO7-7rwL.jpg) ![FNB58 Standard USB Tester - Image 3](https://m.media-amazon.com/images/I/71VXZtPvw7L.jpg) ![FNB58 Standard USB Tester - Image 4](https://m.media-amazon.com/images/I/71yAxsR1Z4L.jpg) ![FNB58 Standard USB Tester - Image 5](https://m.media-amazon.com/images/I/71xF-M9mHbL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excellent USB-C cable and charger diagnostic *by T***O on August 11, 2023* It's not perfect.. it has bugs, quirks, and inexplicable interactions, but --- once you figure out how to test the things that matter to you, it's very repeatable and clear. Specifically, it can read the Chip ID in USB-C cables, and show all the available power modes in USB-C PD, on a nice color built-in screen. That's nice. You can see the finer details of PD packet exchange as well, but this was less reliable. For testing batteries and other sources, it has a convenient "Trigger" function that can request any voltage or current from your supply, with a nice physical Switch that engages or disengages the "active" part. Switched off, the device is pass-through only and zero risk. Switched ON, you have a lot of direct control over voltage, and of course, risk. You want to put 20v on a USB-A socket? You can! I find the device is best to use when it's plugged into its own independent Micro-USB power source (5v, low current), because then it's not constantly turning off and on with your devices under test. It's easy to crash the device when messing with USB-PD packets, or even have it just beep nonstop until you pull power. The firmware could use some work. Some functions are duplicated or confusing (how many different trigger menus do you need?) but hey, it's affordable for DIY hobby work and comes in a nice well-made housing with an excellent screen for cheap. Unfortunately, the company web site is terrible, hosted on some Mediaflare thing that runs out of bandwidth, so downloading the firmware updates is way more hassle than it should be. They need to up their game, put up a professional site, and host their own files. ### ⭐⭐⭐⭐⭐ High quality, capable and great display *by B***Y on October 9, 2024* Pros: 1) Nice metal case with easy to use controls 2) Excellent, bright and clear display, with auto-rotate 3) Loads of technical capabilities 4) Nice storage box to keep the unit protected 5) Companion Windows app (NOT macOS) is nicely done, and turns this into a capable testing and measurement device. The only con is the documentation, which is a bit lacking. I had to go to YouTube to learn how to upgrade the firmware (which was necessary because the unit displayed incorrect temperature readings). All in all though, if you're reasonably technically savvy, there won't be any significant issues. Recommended! The manual and firmware are available at the FNIRSI website. ### ⭐⭐⭐⭐ There's something weird when charging iPhones *by B***9 on May 26, 2024* Overall this is a nice tester. Very accurate, lots of features (I like the realtime graph, very interesting to see how the current fluctuates over time). There's one weird problem though. My iPhone 15 Pro max is incapable of requesting 9V from a USB-PD charger when using the tester normally. It only gets 5V, which limits charging power to about 12W. In order to get 9V, you have to enter the PD trigger menu. Then, it can negotiate 9V. You can leave the PD trigger menu after that. The weird thing is, when I used this tester on my laptop, the laptop was able to get 20V without having to do anything special (which is a good thing because it can't charge on anything less). Not sure why the iPhone requires entering the PD trigger menu. ## Frequently Bought Together - USB Tester 4-28V 7A LCD USB A&C Voltage Current Power Tester Multimeter, Fast Charge Detection Trigger Capacity Ripple Measurement, PD2.0/PD3.0,QC2.0/QC3.0 - Treedix USB Cable Tester Board USB Cable Checker Data Wire with Acrylic Case Charging Test Data Line Type-C Micro Type A Type B - DROK USB Load Tester, Electronic Load Test Resistor Module 25W LD25 USB and Type C Interface Discharge Adjustable Constant Current 0.25A-4A Intelligent Temperature Control with Cooling Fan --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.fr/products/506601492-fnb58-standard-usb-tester](https://www.desertcart.fr/products/506601492-fnb58-standard-usb-tester) --- *Product available on Desertcart France* *Store origin: FR* *Last updated: 2026-06-01*