Measures, tests and monitors the voltage and amp capacity of your computer or laptop's USB ports and any connected USB devices Features Determine Volt and Amp Capacity of Your USB-A Cable, Charger or Port in Real Time You need to know when your USB devices are receiving an acceptable and proper charge. You also need to know the power requirements of your PC, laptop, tablet, MacBook, Ultrabook or Chromebook, so you can determine which USB cables, hubs and chargers work most efficiency with them. This USB-A voltage/current tester connects between the USB source you wish to test and a connected USB device to determine the voltage and amperage. An Ideal Tool for Immediate Troubleshooting You'll be able to quickly and accurately detect defective USB cables, chargers and ports in your various devices at home or on the go. Recommended for use with multiport USB chargers and hubs, this tester kit ensures each connected device is receiving the appropriate amount of power from its USB port. An easy- to-read LCD screen displays the voltage and amperage in real time. Dual LEDs indicate whether voltage or current is being displayed on the LCD. Plug-and-Play Tester Comes Ready to Connect Right Away The T050-001-USB-A requires no software or drivers to download and install and no connection to external power. It supports USB 3.1 Gen 1, but is also backward compatible with previous USB versions, so you can use it with USB 3.0, 2.0 and 1.1 ports and devices. Sleek Miniature Housing Designed for Everyday Workspace Use or Connecting on the Go The compact unit is designed for convenient positioning within your reach, allowing you to monitor voltage and current while not taking up much workspace. It is also tiny enough to pack in your pocket, purse or laptop bag for use in a hotel, conference room, trade show or airport.