GB GUSB-3300 USB Tester, LED Display, Functions: AC Voltage, Red

Gardner Bender's GUSB-3300 USB Tester is a 3 function USB tester used for checking for the presence of voltage and testing for proper wiring and polarity. The tester features a high-impact housing and a pocket clip. It features an LED that illuminates to easily indicate one of four different USB conditions dead port, ok port, reversed polarity and AC voltage present. Features a 1 year warranty.