useless for small currents

+ Compact housing
+ Low resistance (measuring resistance 10 to 20 mOhm)
o power consumption approximately 25 mA
o from 200 mA usable power indicator
- Voltage accuracy even moderately (eg: 5.06V; indicator 4.94)
- Below 150 mA current flow very imprecise indicator, Less than 90 mA is displayed even 0mA: ((
- Does not fit into hard to reach USB port, as larger than standard USB connector
- Income indicator that shows a current reading only a few 10-second delay
- Current and voltage are not displayed simultaneously but alternately

Conclusion: If you do not hurry while reading, only the current measuring> 200 mA is interested and not hard to reach USB port has access to. ME but rather spend two or three euros more and buy a better instrument.

Explanation of the photos. The current is displayed on the left and on the right multimeter the voltage. Despite the load of about 75mA left USB Power Meter displays 0. In the second picture you can see the mediocre accuracy of the voltage display.
Too bad - especially if you want to know how does the charger shortly before the battery is full - or you want to know: can I get this device is still connected to my not self-powered 4-port hub, etc. then this device here no help , Anyone who wants to know how much peak current hergibt his charger, which can perhaps be measured with this device something. Now I have added myself a competing device that really works very satisfactory and is only slightly more expensive.