Great Device to Know Current and Voltage!
Want to know how fast your smartphone and tablet PC are charging through the Micro USB interface? This lovely KCX - 017 USB Current and Voltage Meter is all you need! It can show you the USB charging current and voltage instantly. Through it you can quickly find out device's current and voltage stage, like USB cable, USB wall charger, car charger or solar panel charger, which gives you the fastest charging performance! Flexible, easy to use. KCX - 017 USB Current and Voltage Meter reads the charging status to you in real-time style!

Features:
It can test current and voltage of phone, mobile power bank etc.
With a USB port and micro USB interface, convenient to test devices
With LCD screen, easy to see the current and voltage of the devices
Press the small circle button and the data will be zero, then you can test next data

Parameters:
1. Input Voltage: 3 - 7V
2. Input Current: 50mA - 3500mA
3. Capacity: 0 - 19999mAh
4. LCD show voltage and current simultaneously
5. Save data each time power off
6. High precise current calibration function
7. High and low voltage alarm

Model: KCX - 017
Design: Professional
Feature: Portable
Function: Text Current and Voltage
Interface: USB2.0
Package weight: 0.044 kg
Product Size (L x W x H): 6 x 2.8 x 1.5 cm / 2.36 x 1.10 x 0.59 inches
Package Size (L x W x H): 7 x 4 x 3 cm / 2.75 x 1.57 x 1.18 inches
Package Contents: 1 x Current Voltage Meter

For iPad original charger, connected to 2A load resistor, the output current and voltage is 5.01V 1.89A

For iPad original charger, connected to the 2A load resistor and mobile phones, the measured value of the maximum current and volatage is 5.01V 2.28A , very good charger.

Use 2A load resistor to connect with Salcomp (a Nokia company) charger, the output and volatage is 5.01V 1.89A

Connect 2A load resistor and mobile phones to Salcomp (a Nokia company) charger , the measured value of the maximum current and voltage is 5.06V 2.20A, very good charger.

Mobile power connector USB HUB for mobile phone charging, the measured voltage and current values 5.00V 0.44A

Mobile power via USB HUB, connected to the 2A load resistor and mobile phones, the measured value of the maximum current and voltage 4.86V 1.96A, still good mobile power.

1m original data cable of LG, 1A current charger, USB tester, test result 4.8V 0.92A

1.5m original data cable of Samsung, 1A current charger, USB tester, test result 4.80V 0.92A

Orange data cable, 1A current charger, USB tester, test result 4.22V 0.81A. This cable quality is no good.