Using this deveice you can come to know how much Ampere the Power Bank / Charger gives. you can know the fake and orignal power bank or charger rating. 

Description:
Measuring accuracy: 1%
Refresh speed: about 200ms time
Display mode: Current and voltage are displayed alternately
Voltage measurement range:   3.5V-7V
Current measurement range: 0A-3A
Operating current: 20mA
Storage temperature: -10 ° C to + 65 ° C
Meter drop: 200mV
Weight: 18g
Size: 52 * 20 * 15mm

Product Features:
This product can measure the USB power supply equipment empty, the load voltage, the work voltage and current of USB terminal equipment
This product uses the original import of single-chip sampling and display voltage, and there is a lot of data processed in the software, so that display is accurate and stable.
This product is ultra-small size.
This product current, voltage cycle display, easy to use and practical.
This product is small and easy to carry, there is no need another power supply.
 
Package Included:
1 X USB Charger Doctor