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![USB Port Testers](https://images.findtheneedle.co.uk/findtheneedle/products/7811657.jpg)
This product is a very useful little tool for the professional engineer's toolbox. Simply plug it into a USB port and the LCD display shows what voltage level there is available. Plug a USB device into the tester's extension port, flick a switch and you can see what current your device is drawing.
For more information on USB Port Testers talk to i4 Automation Ltd
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