USB Power Current Voltage Detector Portable Tester

How could I measure the normal power consumption of my USB gadgets? And How can I measure how much current a smart phone charging takes from USB port?

Our New USB Blue Tester is the answer:

– Compact design, easy to take and test the USB port’s output voltage and working current
– Plug and play, the voltage and current will show in turn on the display
– Adopted the new generation integrated circuit, high accuracy, stable operation, best anti-interference
– Suitable for mobile charger, USB disk in factory, lab and personal use

Model: KW201
Working range: 3 – 7.5 V, 0 – 3 A
Resolution: 10mV, 1mA
Error: Voltage less than + / – 1%, current less than + / – 2%
Full range voltage drop: 200mV ( current detecting )
Working temperature: 0 – 60 Deg.C