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The second generation UT658 series USB testers can inspect USBchargers, portable power sources, USB type A and C cables andother electronic charging devices. UT658 measures output voltage,current, energy, capacity, circuit equivalent resistance, D+ andD- voltages of USB data cables. This series is designed to beprecise, reliable, stable, and portable. They are great tools forapplications such as manufacturing veriﬁcation, engineeringtesting, and DIYers.