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This tester seems to work well, and the price I paid is extremely reasonable. I checked the readings of this tester against digital multimeter readings, and both readings agreed. I can't yet comment on it's reliability. I highly value such a tester, because I never trust the voltage output of a USB charger without evaluation. That's especially true with off-brand chargers and public charge ports, such as at an airport. Too high a charger voltage can destroy an expensive device. The small size and accuracy of this device make it convenient and appropriate to take along whenever I may need to charge my phone or tablet with a charger of unknown character.
Verified purchase: Yes | Condition: New
I have had several of these they were terrific they are small and they feel little absent-minded like me I tend to lose them but I keep buying them over and over because they do work you get a good read on if the charger is working well or the battery is accepting the charge it's a wonderful item
Verified purchase: Yes | Condition: New
I've been noticing variation in charge rate and this item easily helped me test my wires and find the issue. No household should be without. Shows amp and voltage and its the perfect tool for any techy.
Verified purchase: Yes | Condition: New
A good value, small, accurate and useful. Suggested for anyone needing to see what a USB port is doing.
Verified purchase: Yes | Condition: New
Works as expected, but the red 7-segment display is a bit dim, regardless of power source. It can be very hard to see the readings in light conditions, such as normal daylight.
Verified purchase: Yes | Condition: New