his diagnostic kit gives you everything you need to make sure your USB devices are getting the proper charge. The diagnostic kit lets you monitor the voltage and current being delivered to your device more→while it's charging, which makes it easy to test different power supplies such as wall and car chargers, computer USB ports, mobile charging banks, and charging stations. It's the perfect diagnostic tool for any test lab or repair facility, because you can monitor the current and voltage consumption of your Apple or Android devices against various power supplies, in order to determine if there's an issue with a specific charger, cable or battery. Plus, if you have several mobile devices at home …