BlueCraft USB Digital Multimeter Tester Power Meter Current/Voltage Monitor, DC 5.1A 30V with USB cable Test Speed of Chargers, Cables, Capacity

Nice little gadget that gives me way more information than I need but too much is far better than not enough. The text is really small so hopefully you have your reading glasses on. Haha

Works perfectly. 3rd page of data is in Chinese rather than English

works great and great price