This USB Charging Current / Voltage Detector Mobile Power Tester - Ocean Blue 3 is very good. works really fine. I can measure in what voltage my device is charging and on what current. This gadget is very useful to check your power supplies or cables. Really satisfied and recommend to others.

Nov 25,2019

good and cheap little helper to indicate voltage and amperage. it shows each for a second and then switches to the other. so real time amperage observation is a challenge, but it was expected for the price. see my video for a closer look at the product in action.

Sep 09,2019

výborná vec pre potreby domácnosti. ukazuje celkom presne V aj A. Ja ju používam aby som zistil či nejaký spotrebič nabíja a kedy končí nabíjanie - ampére klasnú na nulu. z výrobkom som veľmi spokojný - používam ho už asi 4 roky

great thing for household needs. shows quite accurately both V and A. I use it to find out if an appliance is charging and when charging ends - amperes classic to zero. I am very satisfied with the product - I have been using it for about 4 years

May 06,2020

Legge amperaggio e voltaggio. Ci si rende conto di quello che arriva realmente nei nostri dispositivi usb quando li carichiamo o li infiliamo in una qualsivoglia presa.

Jan 30,2019

really useful product quality is good cheapest accuracy detector and I have my mi 2a power bank is that a fast charging support pls see my attached video how it works

Nov 26,2019

It is really useful. u like being able to see how fast my phone is charging. Also, you can see which charger us the best

Aug 02,2019

A very useful tool, which can show how much current a USB port is delivering (and the voltage). Some phones and tablets can use 2A or more, and it's good to be able to check this. Easy to use and also great value.

Jul 25,2019

A great little tool for iPhone diagnostics. Use it to get an idea about the motherboard/charging status with all the shattered iPhones.

Jan 28,2020

A simple usb voltage gauge. It does its job to test and see if cables/ chargers/ external battery packs are QC compliant.

Jun 23,2019

useful to diagnose usb charging issues. and seems very accurate. i recommend

Nov 10,2019