---
product_id: 154985357
title: "USB C Tester,KJ-KayJI 2 in 1 Tester Color Screen IPS Digital Multimeter(2024),Voltage,Cur,Pwr,Resistance,Elec,Temp,Capacity,Tme,Fast Charging,with USB Clip Cable Support PD2.0/PD3.0,QC2.0/QC3.0,BC1.2"
brand: "kj-kayji"
price: "140.85 DT"
currency: TND
in_stock: true
reviews_count: 8
category: "Kj Kay Ji"
url: https://www.desertcart.tn/products/154985357-usb-c-tester-kj-kayji-2-in-1-tester-color
store_origin: TN
region: Tunisia
---

# Supports PD2.0/PD3.0 fast charging Multi-parameter IPS color display Bidirectional USB-C input/output USB C Tester,KJ-KayJI 2 in 1 Tester Color Screen IPS Digital Multimeter(2024),Voltage,Cur,Pwr,Resistance,Elec,Temp,Capacity,Tme,Fast Charging,with USB Clip Cable Support PD2.0/PD3.0,QC2.0/QC3.0,BC1.2

**Brand:** kj-kayji
**Price:** 140.85 DT
**Availability:** ✅ In Stock

## Summary

> ⚡ Empower Your Charge Game with Real-Time USB Insights!

## Quick Answers

- **What is this?** USB C Tester,KJ-KayJI 2 in 1 Tester Color Screen IPS Digital Multimeter(2024),Voltage,Cur,Pwr,Resistance,Elec,Temp,Capacity,Tme,Fast Charging,with USB Clip Cable Support PD2.0/PD3.0,QC2.0/QC3.0,BC1.2 by kj-kayji
- **How much does it cost?** 140.85 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/154985357-usb-c-tester-kj-kayji-2-in-1-tester-color)

## Best For

- kj-kayji enthusiasts

## Why This Product

- Trusted kj-kayji brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Yet Robust:** Lightweight, pocket-sized design with durable build and intuitive button controls for on-the-go professionals.
- • **Smart Safety Alerts:** Voltage and current warning system protects your devices by auto-shutdown on unsafe levels.
- • **Precision Power Metrics:** Real-time voltage, current, power, and capacity readings for ultimate charging insight.
- • **Universal USB Compatibility:** Seamlessly tests USB-A, USB-C, Micro-USB cables, chargers, and power banks with PD/QC/BC fast charge standards.
- • **Dynamic Multi-Screen Interface:** Customizable IPS color screen with multiple display modes including voltage, resistance, temperature, and elapsed time.

## Overview

The KJ-KayJI USB C Tester J7-C is a cutting-edge 2-in-1 digital multimeter featuring an IPS color screen that delivers precise voltage, current, power, resistance, temperature, and capacity measurements. Compatible with USB-C devices supporting PD2.0/PD3.0, QC2.0/QC3.0, and BC1.2 fast charging protocols, it offers bidirectional USB-C input/output testing and multi-screen customizable interfaces. Designed for tech-savvy professionals, it ensures device safety with voltage/current warnings and supports comprehensive testing of chargers, cables, and power banks in a compact, user-friendly form factor.

## Description

Product description Tester Latest Button Functions Press Once-Click: Switch the Display Interface Fast Double-Click: Capacity mAH Clear Fast Press Three-Click: Current WH Clear Fast Press Four-Click: Time Clea Fast Press Five-Click: Switch Data Storage Group (NO.X) Long Press Button, Capacity, Power, Time, Clear the current group (mAh, Wh, 00:00:00) Switch to the Screen rotation interface Long Press the Screen to Flip, Other interfaces can only long press to clear data. Voltage and current warning interface:2 click to add, 3 click to reduce,When add and reduce, long press is continuous addition and subtraction; Tips： If there is current in the tester at no load,​Press and hold the tester button,insert the device,and calibrate to zero. During calibration,the output must not have any current consumption. Tester highlights When inserting the tester into the USB-C device and USB C Cable/usb a to usb c Cable, you must use the OTG adapter (Micro-usb adapter) or Micro-usb Cable to insert the Micro-USB INPUT Port of the USB Tester to trigger the PD charging function. The tester can be used normally. Scope of application Micro-usb cable, usb a to usb c Cable, usb c to usb c Cable. USB A Charger, USB C Charger, Power Bank and other USB devices. USB C bidirectional current: USB C input and USB C output ports can be used with each other, not limited to the input port or the output port. Inserting USB C Cable into USB C output requires USB C input into the device (mobile phone, Laptop) to form a current loop, so that the tester can display normally and the data is the same. Important:Please download more information from Product guides and documents The product is constantly updated and new content is added, so sometimes the version you receive may be different from the description, but it does not affect the use of the product. Multi-screen interface Chinese and English interface display: voltage, current, power, resistance, electricity, CPU temperature, capacity, temperature, timing, test group. Large font capacity interface: voltage, current, power, capacity, power, test group, charging direction. Personalized interface: personalized interface such as voltage and current. USB 4-wire detection interface: multiple fast charging identification, fast charging identification display, V-: ground wire, D+/D-: USB fast charging D+/D- logic voltage value, V+: power supply voltage, timing, resistance, power, capacity, current/power. Screen flip interface: switch to this interface, long press the button to flip the screen 180°, other interfaces cannot be flipped by long pressing. Voltage and current warning interface: adjust the Max/Min voltage and Max current of the tester,When the voltage and current exceeds or falls below this range, the tester will shut down to protect your equipment. Test Micro-usb/usb a to usb c/usb c to usb c Cable Tips: You need to test the charger before testing the cable 1. Check the supported voltage and current of the charger, insert the tester, connect the adjustable Load, adjust the current to the supported current of the charger, the voltage does not change The charger is of excellent quality. The quality of the charger is poor if the voltage drop exceeds 1V, and the voltage drop within 0.5V is within the normal range. 2. Use the tested charger to insert the corresponding cable, adjust the current to the supported current of the charger, if the voltage drop exceeds 1V, the cable quality is poor, and the voltage drop within 0.5V belongs to the normal range. Test Charger,Support USB A Charger/USB C Charger. Test Cables, Support Micro-usb Cable/usb a to usb c Cable/usb c to usb c Cable. Test Power Bank/Phone Capacity Tester Power Bank Fully charge the power bank, insert it into the tester, clear the mAh of the tester, connect to Load to quickly discharge to obtain mAh capacity,multiply by 90%. Tester Phone Capacity The phone is fully charged, plugged into the tester, cleared Wh data, connected to Load, quickly discharged, and acquired data. Electricity: Wh/3.75V(Phone battery voltage)=Capacity value X 1000 X90%=Phone mAh capacity.(which is close to the phone battery capacity) Tester Charger/Cable Whether to support Fast charging Tester USB A/USB C Charger,USB A to USB C Cable, USB C to USB C Cable, Micro-usb Cable. Test Charger Insert the tester into the charger, connect Load, adjust the current to 3A, if it supports fast charging, the fifth interface will display "FCP" "FAST". If it does not support fast charging, "FCP" "FAST" will not be displayed. Test charging cable Use a charger that has been tested by the tester to support fast charging, plug the corresponding cable into the charger, and adjust to 3A after connecting the cable. If the fifth interface displays "FCP" and "FAST", it supports fast charging. If it does not support fast charging, "FCP" "FAST" is not displayed. Test various cables / monitor charging status Charge your phone safely and check data in real time Support QC3.0 (3.8 ~ 12V) QC2.0 (5V / 9V / 12V / 20V) Android BC1.2 (5V) Apple 5V / 2.4A and MTK-PE (5V / 7V / 9V / 12V) And other Qualcomm fast charge Test various USB / Type-C chargers Plug the tester into the charger and connect an adjustable current loader, Perform current adjustment and test the current and voltage data of the charger. Let the charger be connected to the current loader for a long time to check the stability of the charger Charge test / 1 X 2 Can meet the output of two devices at the same time, support Type-C devices, intelligent charging scheme, and ensure the safety of the device Laptop Charge Monitoring When you power the notebook, connect a KJ-KayJI test meter to monitor the voltage, current, capacity, power,temperature and other technical parameter information in real time.

Review: Works great! - This is high tech. User friendly. Compact piece of technology at your fingertips and quality is still there. Excellent display screen for voltage ,amps, milliamps and is an excellent quality meter with accurate readings. some things can be programmed for your personal taste of how it should be set. Many different screens. How many amp hours it takes to charge your battery or how many amp hours are left on your battery. It's extremely easy answers to all your electronic questions by reading the instructions to acquire the answer you're looking for. Has different languages but I forgot exactly which ones my apologies. Excellent value for the money. I consider this a must-have item for anybody that's into electronic troubleshooting and observing electrical input, output etc. Beautiful color screen, easy to read, small font. Well laid out display screen. Amazing piece of technology that works when you wanted to with quality behind it. Thanks
Review: Great little tester, with some quirks - I use this for testing USB-C chargers, battery packs, and cables. I love that it gives you so much information - not just V and mA like the Satechi, but watts (which is the most important metric overall!) and also total charge (mAh) and total energy (mWh), elapsed time and more. I used it to know that my Pixel 2 XL wasn't getting 9V from the USB-C charger I was using; replacing that gave me much faster charges. The UI is a bit wonky; the "W" for watts is some kind of strange character, but you get used to it. To reset the charge time, total charge, and total energy, each one is a separate reset, so to reset all you have to double-click, then triple-click, then quad-click. The "input" and "output" USB-C ports are labeled backwards, and the "manual" (even the new one) is pretty hopeless. "Resistance" is a bit weird, it's just V/I as far as I can tell, a bit meaningless for this application. (It won't measure your resistors.) And I wish it had a display mode that showed watts in larger font. But on the good side, it's accurate, the display is clear, it has all the info you could want, I like that you can flip it upside down, and also it remembers your settings between uses which is great. And the multiple inputs & outputs are super useful. You can test pretty much anything USB-related with it. Although, it says it can test batteries: not really so much. It comes with alligator-clip cables which you can hook to a voltage source of 3V or more (i.e. not a AA or AAA battery) and it'll measure voltage, but not under load which is what a battery tester needs to do. That's not why I bought it though so I'm good with that. On the other hand, if you have a USB AA/AAA battery charger, you can hook this tester into that and measure the total charge sent to the batteries you're charging.

## Features

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## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07X3HST7V |
| Best Sellers Rank | #77,417 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #101 in Multi Testers |
| Brand | KJ-KayJI |
| Brand Name | KJ-KayJI |
| Color | Black |
| Compatible Devices | USB-C devices supporting PD2.0/PD3.0, QC2.0/QC3.0, BC1.2 standards |
| Customer Reviews | 4.5 out of 5 stars 2,166 Reviews |
| Item Dimensions | 3.23 x 2.44 x 0.39 inches |
| Item Weight | 34.5 Grams |
| Item dimensions L x W x H | 3.23 x 2.44 x 0.39 inches |
| Manufacturer | KJ-KayJI |
| Measurement Type | Multimeter |
| Model | J7-C |
| Part Number | J7-C |
| Power Source | Corded Electric |
| Specification Met | CE, RoHS |
| Style | Voltage Tester |
| Style Name | Voltage Tester |

## Product Details

- **Brand:** KJ-KayJI
- **Power Source:** Usb-a,usb-c
- **Style:** Power Tester
- **Color:** Black
- **Item Weight:** 34.5 Grams

## Images

![USB C Tester,KJ-KayJI 2 in 1 Tester Color Screen IPS Digital Multimeter(2024),Voltage,Cur,Pwr,Resistance,Elec,Temp,Capacity,Tme,Fast Charging,with USB Clip Cable Support PD2.0/PD3.0,QC2.0/QC3.0,BC1.2 - Image 1](https://m.media-amazon.com/images/I/61E+kuQxEvL.jpg)

## Available Options

This product comes in different **Set** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great!
*by L***N on December 26, 2024*

This is high tech. User friendly. Compact piece of technology at your fingertips and quality is still there. Excellent display screen for voltage ,amps, milliamps and is an excellent quality meter with accurate readings. some things can be programmed for your personal taste of how it should be set. Many different screens. How many amp hours it takes to charge your battery or how many amp hours are left on your battery. It's extremely easy answers to all your electronic questions by reading the instructions to acquire the answer you're looking for. Has different languages but I forgot exactly which ones my apologies. Excellent value for the money. I consider this a must-have item for anybody that's into electronic troubleshooting and observing electrical input, output etc. Beautiful color screen, easy to read, small font. Well laid out display screen. Amazing piece of technology that works when you wanted to with quality behind it. Thanks

### ⭐⭐⭐⭐⭐ Great little tester, with some quirks
*by G***O on March 6, 2020*

I use this for testing USB-C chargers, battery packs, and cables. I love that it gives you so much information - not just V and mA like the Satechi, but watts (which is the most important metric overall!) and also total charge (mAh) and total energy (mWh), elapsed time and more. I used it to know that my Pixel 2 XL wasn't getting 9V from the USB-C charger I was using; replacing that gave me much faster charges. The UI is a bit wonky; the "W" for watts is some kind of strange character, but you get used to it. To reset the charge time, total charge, and total energy, each one is a separate reset, so to reset all you have to double-click, then triple-click, then quad-click. The "input" and "output" USB-C ports are labeled backwards, and the "manual" (even the new one) is pretty hopeless. "Resistance" is a bit weird, it's just V/I as far as I can tell, a bit meaningless for this application. (It won't measure your resistors.) And I wish it had a display mode that showed watts in larger font. But on the good side, it's accurate, the display is clear, it has all the info you could want, I like that you can flip it upside down, and also it remembers your settings between uses which is great. And the multiple inputs & outputs are super useful. You can test pretty much anything USB-related with it. Although, it says it can test batteries: not really so much. It comes with alligator-clip cables which you can hook to a voltage source of 3V or more (i.e. not a AA or AAA battery) and it'll measure voltage, but not under load which is what a battery tester needs to do. That's not why I bought it though so I'm good with that. On the other hand, if you have a USB AA/AAA battery charger, you can hook this tester into that and measure the total charge sent to the batteries you're charging.

### ⭐⭐⭐⭐ Looks like a defective unit - UPDATE - Working unit!
*by Y***U on January 6, 2023*

I was very interested in this meter to verify power output of the numerous USB charging receptacles installed around my house, as well as fitness of the numerous USB charging cables. However, after reading the poor instruction sheet which has no diagnostic section I am going to have to return this unit. As picture shows, the unit displays voltage but no reading on amperage. Same across all charging ports tested. *** UPDATE *** Rack it up to my ignorance and also the quality of the product instructions, but the reason the image is showing 0.00 amps is because there is no load on the opposite side of the meter. When phone, tablet, laptop or other device is connected to the meter, it will register amperage, just fine. The product also has a nice feature of 180 degree rotation of the display. I would also mention that some individuals will find the display dimly lit. I had to use a magnifying glass or take a phone picture of the display to read some of the display modes. All in all, it is worth purchasing this meter, if you are curious about the fitness of your charging blocks, wall charging ports on A/C receptacles with USB chargering ports.

## Frequently Bought Together

- USB C Tester,KJ-KayJI 2 in 1 Tester Color Screen IPS Digital Multimeter(2024),Voltage,Cur,Pwr,Resistance,Elec,Temp,Capacity,Tme,Fast Charging,with USB Clip Cable Support PD2.0/PD3.0,QC2.0/QC3.0,BC1.2
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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-07-09*