--- product_id: 496608936 title: "FNIRSI USB Tester 4-28V 7A LCD USB A&C Voltage Current Tester Multimeter with Bluetooth, Fast Charge Detection Trigger Capacity Ripple Measurement, PD2.0/PD3.0,QC2.0/QC3.0" brand: "fnirsi" price: "€ 0.04" currency: EUR in_stock: false reviews_count: 5 url: https://www.desertcart.pt/products/496608936-fnirsi-usb-tester-4-28v-7a-lcd-usb-a-c store_origin: PT region: Portugal --- # 7A max current 16-bit ADC precision 4-28V voltage range FNIRSI USB Tester 4-28V 7A LCD USB A&C Voltage Current Tester Multimeter with Bluetooth, Fast Charge Detection Trigger Capacity Ripple Measurement, PD2.0/PD3.0,QC2.0/QC3.0 **Brand:** fnirsi **Price:** € 0.04 **Availability:** ❌ Out of Stock ## Summary > ⚡ Power up your diagnostics with precision and speed! ## Quick Answers - **What is this?** FNIRSI USB Tester 4-28V 7A LCD USB A&C Voltage Current Tester Multimeter with Bluetooth, Fast Charge Detection Trigger Capacity Ripple Measurement, PD2.0/PD3.0,QC2.0/QC3.0 by fnirsi - **How much does it cost?** € 0.04 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/496608936-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 - • **Dynamic Data Visualization:** 2.0-inch full-color TFT LCD with gravity sensor auto-rotates for effortless monitoring from any angle. - • **Ultra-Precise Power Metrics:** 16-bit ADC and PD chip deliver razor-sharp voltage, current, and power readings for flawless diagnostics. - • **Fast Charge Protocol Mastery:** Automatically detects and triggers QC2.0/3.0, PD2.0/3.0, VOOC, and more—never miss a fast charge beat. - • **Universal USB Interface Trio:** Seamlessly test USB-A, Micro-USB, and Type-C devices with one sleek, integrated tool. - • **Advanced Cable & Ripple Analysis:** Read E-Marker and DASH cable data, measure internal resistance, and capture high-speed ripple waveforms up to 4M sps. ## Overview The FNIRSI FNB58 USB Tester is a cutting-edge multimeter designed for professionals who demand precision and versatility. Featuring a 2.0-inch full-color TFT display, integrated USB-A, Micro-USB, and Type-C ports, it measures voltage (4-28V), current (up to 7A), power, resistance, and temperature with 16-bit ADC accuracy. It supports fast charge protocols including QC2.0/3.0, PD2.0/3.0, VOOC, and more, with real-time monitoring and recording capabilities. Advanced features like E-Marker cable reading, ripple waveform analysis, and gravity sensor auto-rotation make it an indispensable tool for tech-savvy managers and engineers aiming to optimize device charging and power consumption. ## Description FNB58 USB tester is a high-reliability, high-safety USB voltage andcurrent detection meter and a mobile communication terminal fast chargingtrigger.It has a 2.0-inch full-color ultra-wide viewing angle TFT LCD display, integrated USB-A, Micro-USB, Type-C interface.Use external 16-bit ADC, PD protocol physical chip.It can be used to measure the power supply or power consumption of products such as USB interfaces, mobile phone chargers, and U disks.It can be used to measure the charging power of mobile phones and the input and output of mobile power supplies. It can be used to test the fast charging protocol of chargers.This instruction manual includes relevant safety information, warningtips and solutions to common abnormal situations. Please read the relevantcontent carefully and strictly abide by all warnings and precautions.Do not connect the monitoring interface to a power supply exceeding 28V.Do not connect the PC connection port to a power source exceeding 16v.Only one pair of monitoring interfaces (one input port,one outputport) can work at the same time. When there is a pair of monitoring interfaces working, it is forbidden to connect to the equipment onother monitoring interfaces. (Except the PC connection port, the PC port can be connected to an external power supply).When using the fast charge trigger module,please do not connect equipment that cannot withstand high voltage to any monitoring interface.After using the PD trigger/monitor/conversion/read E-Marker cablefunction, please turn the PD communication switch in the lower rightcorner back to the OFF position.Do not charge the phone after the fast charge is triggered. Review: Produto de excelente qualidade, ótimo acabamento e muito preciso Review: Excelente , cumple con lo publicado, ## Features - 【Updated Designed USB Tester】FNIRSI 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. It is a high-reliability, high-safety USB voltage andcurrent detection meter and a mobile communication terminal fast chargingtrigger. Gravity sensor, automatically switch the display direction. - 【Multifunction USB Digital Tester】FNB58 uses external 16-bit ADC, PD protocol physical chip. It can be used to measure the power supply or power consumption of products such as USB interfaces, mobile phone chargers, and U disks. FNB58 USB tester can monitor the voltage, current, power, resistance, capacity, temperature, D+/D- voltage etc, it can be used to test the fast charging protocol of chargers. - 【Fast Charge Protocol Trigger Detection】FNB58 supports trigger detection of various fast charging protocols, QC2.0/QC3.0 trigger, FCP/SCP trigger, AFC trigger, PD2.0/3.0 trigger, VOOC/WARP trigger, 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 Detection and Recording】The highest six-digit display of voltage, current and power, the highest resolution is 0.00001 (V/A/W). 10 sets of switchable capacity, power and time statistics. 1 set of voltage and current curve records, maximum support 9 hours. Support low-speed waveform (voltage, current, D+/D-) drawing, 2sps->100sps sampling rate. Support high-speed ripple (voltage, AC coupling)drawing, up to 4M sps sampling rate. - 【Other detection functions】FNB58 also has many functions that other USB testers do not have. The internal 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. ☆☆In order to respond to the environmental protection policy and reduce the waste and use of paper, FNB58 does not come with paper manuals. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BJ253W31 | | Best Sellers Rank | 278,337 in DIY & Tools ( See Top 100 in DIY & Tools ) 761 in Multi Testers | | Brand | FNIRSI | | Colour | black | | Customer Reviews | 4.4 4.4 out of 5 stars (612) | | Included Components | USB Tester | | Item Weight | 45 g | | Manufacturer | FNIRSI | | Maximum Operating Voltage | 28 Volts | | Measurement Type | Voltmeter, Ammeter, Ohmmeter | | Minimum Operating Voltage | 4 Volts | | Model Number | FNIRSI-001 | | Power Source | Corded Electric | | Specification Met | IEC 1010, UL | | Style Name | Modern | | Upper Temperature Rating | 40 Degrees Celsius | ## Product Details - **Brand:** FNIRSI - **Colour:** black - **Item weight:** 45 g - **Power source:** Corded Electric - **Style:** Modern ## Images ![FNIRSI USB Tester 4-28V 7A LCD USB A&C Voltage Current Tester Multimeter with Bluetooth, 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) ![FNIRSI USB Tester 4-28V 7A LCD USB A&C Voltage Current Tester Multimeter with Bluetooth, Fast Charge Detection Trigger Capacity Ripple Measurement, PD2.0/PD3.0,QC2.0/QC3.0 - Image 2](https://m.media-amazon.com/images/I/71l+PaEZJIL.jpg) ![FNIRSI USB Tester 4-28V 7A LCD USB A&C Voltage Current Tester Multimeter with Bluetooth, Fast Charge Detection Trigger Capacity Ripple Measurement, PD2.0/PD3.0,QC2.0/QC3.0 - Image 3](https://m.media-amazon.com/images/I/81iASFnmbVL.jpg) ![FNIRSI USB Tester 4-28V 7A LCD USB A&C Voltage Current Tester Multimeter with Bluetooth, Fast Charge Detection Trigger Capacity Ripple Measurement, PD2.0/PD3.0,QC2.0/QC3.0 - Image 4](https://m.media-amazon.com/images/I/81IutHHhGqL.jpg) ![FNIRSI USB Tester 4-28V 7A LCD USB A&C Voltage Current Tester Multimeter with Bluetooth, Fast Charge Detection Trigger Capacity Ripple Measurement, PD2.0/PD3.0,QC2.0/QC3.0 - Image 5](https://m.media-amazon.com/images/I/81boqTui7vL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by W***N on 17 February 2024* Produto de excelente qualidade, ótimo acabamento e muito preciso ### ⭐⭐⭐⭐⭐ Review *by E***E on 3 December 2025* Excelente , cumple con lo publicado, ### ⭐⭐ Review *by A***. on 27 May 2025* Doesnt display mah which is what i needed this for. Displays absolutely everything else but. Annoying it doesnt show basic mainly used use case of battery capacity, but makes you work it out from other measures. Has many screens, not on any of them, cannot set it to display mah, very hard to use overall vs many other similar products - so expensive and got a lot of stuff i dont need with it, and not the basic function i do need. ## 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.pt/products/496608936-fnirsi-usb-tester-4-28v-7a-lcd-usb-a-c](https://www.desertcart.pt/products/496608936-fnirsi-usb-tester-4-28v-7a-lcd-usb-a-c) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-04-24*