--- product_id: 497340792 title: "FNIRSI USB Tester 4-28V 7A LCD USB A&C Voltage Current Power Tester Multimeter with App Software, Fast Charge Detection Trigger Capacity Ripple Measurement, PD2.0/PD3.0,QC2.0/QC3.0" brand: "fnirsi" price: "€ 102.73" currency: EUR in_stock: true category: "Fnirsi" url: https://www.desertcart.de/products/497340792-fnirsi-usb-tester-4-28v-7a-lcd-usb-a-c store_origin: DE region: Germany --- # 7A max current detection App-enabled real-time monitoring 4-28V voltage range FNIRSI USB Tester 4-28V 7A LCD USB A&C Voltage Current Power Tester Multimeter with App Software, Fast Charge Detection Trigger Capacity Ripple Measurement, PD2.0/PD3.0,QC2.0/QC3.0 **Brand:** fnirsi **Price:** € 102.73 **Availability:** ✅ In Stock ## Summary > ⚡ Power up your tech IQ with FNIRSI — the ultimate USB tester for pros who demand precision! ## Quick Answers - **What is this?** FNIRSI USB Tester 4-28V 7A LCD USB A&C Voltage Current Power Tester Multimeter with App Software, Fast Charge Detection Trigger Capacity Ripple Measurement, PD2.0/PD3.0,QC2.0/QC3.0 by fnirsi - **How much does it cost?** € 102.73 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/497340792-fnirsi-usb-tester-4-28v-7a-lcd-usb-a-c) ## 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 - • **Multi-Port Mastery:** Seamlessly test USB-A, Micro-USB & Type-C devices with one sleek tool. - • **Dynamic Data Tracking:** Record capacity, ripple, and waveform with up to 4M sps sampling for pro-grade analysis. - • **Smart App Integration:** Control and monitor via app with gravity sensor for on-the-go diagnostics and firmware updates. - • **Precision Power Metrics:** 16-bit ADC and PD chip deliver ultra-accurate voltage, current, and power readings. - • **Fast Charge Protocol Guru:** Auto-detects QC2.0/3.0, PD2.0/3.0, VOOC, and more for next-level charger insights. ## Overview The FNIRSI FNB58 USB Tester is a professional-grade multimeter featuring a 2.0-inch TFT LCD and integrated USB-A, Micro-USB, and Type-C ports. It supports voltage detection from 4 to 28V and current up to 7A, with advanced fast charge protocol detection including PD2.0/3.0 and QC2.0/3.0. Equipped with a 16-bit ADC and PD physical chip, it offers precise real-time monitoring of voltage, current, power, resistance, and ripple. The device pairs with an app for enhanced data tracking, waveform analysis, and firmware updates, making it an essential tool for tech-savvy professionals and managers who want to stay ahead in device diagnostics. ## Description FNIRSI USB Tester 4-28V 7A LCD USB A&C Voltage Current Power Tester Multimeter with App Software, Fast Charge Detection Trigger Capacity Ripple Measurement, PD2.0/PD3.0,QC2.0/QC3.0: desertcart.com: Tools & Home Improvement ## Features - 【Multi-port 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 and current detection meter with APP software, a mobile communication terminal with gravity sensor and a fast charging trigger - 【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】 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 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 - Ensure the PD function switch is on, select the correct input port, and use a compatible protocol; if incompatible, the device defaults to 5 V output, which may limit power measurement ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BJ253W31 | | Best Sellers Rank | #18,993 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #15 in Voltage Testers | | Brand Name | FNIRSI | | Color | multi-color | | Compatible Devices | USB interfaces, mobile phone chargers, U disks, mobile phones, mobile power supplies, USB-A, Micro-USB, Type-C devices from various brands | | Customer Reviews | 4.4 4.4 out of 5 stars (509) | | Included Components | USB Tester | | Item Weight | 1.6 ounces | | Manufacturer | FNIRSI | | Measurement Type | Voltage, Current, Fast Charge Detection, Etc | | Minimum Operating Voltage | 4 | | Model | FNIRSI-001 | | Part Number | FNIRSI-001 | | Power Source | Battery Powered | | Specification Met | Ul, Iec | | Style Name | FNB58 | | Unit Count | 1.0 Count | | Upper Temperature Rating | 40 Degrees Celsius | ## Product Details - **Brand:** FNIRSI - **Color:** multi-color - **Item Weight:** 1.6 ounces - **Power Source:** Battery Powered - **Style:** FNB58 ## Images ![FNIRSI USB Tester 4-28V 7A LCD USB A&C Voltage Current Power Tester Multimeter with App Software, Fast Charge Detection Trigger Capacity Ripple Measurement, PD2.0/PD3.0,QC2.0/QC3.0 - Image 1](https://m.media-amazon.com/images/I/71VDjC5CdjL.jpg) ## Frequently Bought Together - FNIRSI USB Tester 4-28V 7A LCD USB A&C Voltage Current Power Tester Multimeter with App Software, 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 - Treedix USB Cable Tester with 2.4" Color Screen for eMarker Reading, PD 3.0/3.1 Detection, Resistor and Continuity Check, Compatible with Lightning, Type-C, Micro-B 2.0/3.0, and Mini-B Cables --- ## 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.de/products/497340792-fnirsi-usb-tester-4-28v-7a-lcd-usb-a-c](https://www.desertcart.de/products/497340792-fnirsi-usb-tester-4-28v-7a-lcd-usb-a-c) --- *Product available on Desertcart Germany* *Store origin: DE* *Last updated: 2026-07-12*