--- product_id: 506601492 title: "FNIRSI FNB58 USB Tester, PD/QC, USB-C E-Marker Reader, 28V 7A, USB-A/C | PD2.0/3.0 & QC2.0/3.0, Voltage/Current/Power Monitoring, Real-Time Graphs, Capacity, Ripple, PD Trigger (NO APP/PC Software)" brand: "fnirsi" price: "R$877" currency: BRL in_stock: true category: "Fnirsi" url: https://www.desertcart.com.br/products/506601492-fnirsi-fnb58-usb-tester-pd-qc-usb-c-e-marker store_origin: BR region: Brazil --- # 28V 7A max power monitoring 2.0-inch TFT LCD display Supports PD2.0/3.0 & QC2.0/3.0 protocols FNIRSI FNB58 USB Tester, PD/QC, USB-C E-Marker Reader, 28V 7A, USB-A/C | PD2.0/3.0 & QC2.0/3.0, Voltage/Current/Power Monitoring, Real-Time Graphs, Capacity, Ripple, PD Trigger (NO APP/PC Software) **Brand:** fnirsi **Price:** R$877 **Availability:** ✅ In Stock ## Summary > ⚡ Power up your tech IQ with FNIRSI FNB58 — the ultimate USB tester for pros who refuse to guess. ## Quick Answers - **What is this?** FNIRSI FNB58 USB Tester, PD/QC, USB-C E-Marker Reader, 28V 7A, USB-A/C | PD2.0/3.0 & QC2.0/3.0, Voltage/Current/Power Monitoring, Real-Time Graphs, Capacity, Ripple, PD Trigger (NO APP/PC Software) by fnirsi - **How much does it cost?** R$877 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/506601492-fnirsi-fnb58-usb-tester-pd-qc-usb-c-e-marker) ## 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 - • **Compact Powerhouse:** Lightweight, multi-interface tester with onboard temperature and resistance measurement—no app or PC needed. - • **Precision at a Glance:** Crystal-clear 2.0-inch TFT LCD delivers real-time voltage, current, and power data with six-digit accuracy. - • **Dynamic Real-Time Graphs:** Visualize voltage ripple and waveform data with sampling rates up to 4 million samples per second for pro-level diagnostics. - • **Advanced Cable Intelligence:** Reads USB-C E-Marker and DASH cable chips to ensure your cables meet the highest standards. - • **Universal Fast-Charge Compatibility:** Seamlessly triggers and monitors all major fast-charging protocols including PD, QC, VOOC, and Super VOOC. ## Overview The FNIRSI FNB58 is a compact, battery-powered USB tester featuring a 2.0-inch TFT LCD that monitors voltage, current, power, and capacity up to 28V/7A. It supports a wide range of fast-charging protocols (PD2.0/3.0, QC2.0/3.0, VOOC, Super VOOC) and reads USB-C E-Marker and DASH cable chips. With real-time graphing at up to 4 million samples per second and onboard temperature and resistance measurement, it offers professional-grade diagnostics without requiring any app or PC software. ## Description FNIRSI FNB58 USB Tester, PD/QC, USB-C E-Marker Reader, 28V 7A, USB-A/C | PD2.0/3.0 & QC2.0/3.0, Voltage/Current/Power Monitoring, Real-Time Graphs, Capacity, Ripple, PD Trigger (NO APP/PC Software): desertcart.com: Tools & Home Improvement ## 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 | #103,521 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #78 in Voltage Testers | | Brand Name | FNIRSI | | Color | multi-color | | Customer Reviews | 4.4 4.4 out of 5 stars (185) | | Included Components | USB Tester | | Item Dimensions | 3.23 x 1.65 x 0.47 inches | | Item Weight | 1.6 ounces | | 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 Name | FNB58 | | Upper Temperature Rating | 125 °C | ## Product Details - **Brand:** FNIRSI - **Color:** multi-color - **Item Weight:** 1.6 ounces - **Power Source:** Battery Powered - **Style:** FNB58 ## Images ![FNIRSI FNB58 USB Tester, PD/QC, USB-C E-Marker Reader, 28V 7A, USB-A/C | PD2.0/3.0 & QC2.0/3.0, Voltage/Current/Power Monitoring, Real-Time Graphs, Capacity, Ripple, PD Trigger (NO APP/PC Software) - Image 1](https://m.media-amazon.com/images/I/61r3ahYa0jL.jpg) ![FNIRSI FNB58 USB Tester, PD/QC, USB-C E-Marker Reader, 28V 7A, USB-A/C | PD2.0/3.0 & QC2.0/3.0, Voltage/Current/Power Monitoring, Real-Time Graphs, Capacity, Ripple, PD Trigger (NO APP/PC Software) - Image 2](https://m.media-amazon.com/images/I/71BrO7-7rwL.jpg) ![FNIRSI FNB58 USB Tester, PD/QC, USB-C E-Marker Reader, 28V 7A, USB-A/C | PD2.0/3.0 & QC2.0/3.0, Voltage/Current/Power Monitoring, Real-Time Graphs, Capacity, Ripple, PD Trigger (NO APP/PC Software) - Image 3](https://m.media-amazon.com/images/I/71VXZtPvw7L.jpg) ![FNIRSI FNB58 USB Tester, PD/QC, USB-C E-Marker Reader, 28V 7A, USB-A/C | PD2.0/3.0 & QC2.0/3.0, Voltage/Current/Power Monitoring, Real-Time Graphs, Capacity, Ripple, PD Trigger (NO APP/PC Software) - Image 4](https://m.media-amazon.com/images/I/71yAxsR1Z4L.jpg) ![FNIRSI FNB58 USB Tester, PD/QC, USB-C E-Marker Reader, 28V 7A, USB-A/C | PD2.0/3.0 & QC2.0/3.0, Voltage/Current/Power Monitoring, Real-Time Graphs, Capacity, Ripple, PD Trigger (NO APP/PC Software) - Image 5](https://m.media-amazon.com/images/I/71xF-M9mHbL.jpg) ## 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.com.br/products/506601492-fnirsi-fnb58-usb-tester-pd-qc-usb-c-e-marker](https://www.desertcart.com.br/products/506601492-fnirsi-fnb58-usb-tester-pd-qc-usb-c-e-marker) --- *Product available on Desertcart Brazil* *Store origin: BR* *Last updated: 2026-08-10*