This Tacklife digital multimeter tests the power of your USB ports for just $7

[Windows Central]

If you're a tinkerer and a tester, this will help you get the job done faster.
The Tacklife MUT01 Digital Multimeter USB Power Tester is down to $6.98 with code 2XQ9TEGR on Amazon. While sitting around $10 without the code, it usually sells for closer to $13 and has gone as high as $19. The drop to $7 is the best we've ever seen.

Full story from the WindowsCentral blog...