UNi T LCD USB Tester Detector Voltmeter Ammeter Digital Power Capacity Tester Meter(UT658 Dual) Features: The second generation UT658 series USB testers can inspect USB chargers, portable power sources, data cables and other electronics charging devices. Monitor charging efficiency at any time to protect charging equipment. UT658 measures output voltage, current, energy, capacitance, circuit equivalent resistance, D + and D-voltage of USB data cable, and more.  This series is designed to be accurate, reliable, stable, and portable. They are great tools for applications such as production verification, engineering testing, and DIYers. Specification: Condition: Item Type: USB Tester Model: UT658A, UT658C, UT658 Dual(Optional) Material: ABS Color: White Function Description UT658A UT658C UT658Dual Input-output interface USB Type A Yes   Yes USB Type C   Yes Yes Voltage measuring range 4.00-24.00VDC, resolution ratio:0.01V Yes Yes Yes Current measuring range 0.05-3.00ADC, resolution ratio: 0.01A（Type-A) Yes   Yes 0.05-5.00ADC,resolution ratio: 0.01A（Type-C)   Yes Yes Capacity 0-99999mAh,resolution ratio:1mAh Yes Yes Yes Electric quantity 0-1000Wh Yes Yes Yes Circuit equivalent resistance measurement 1-480Ω Yes Yes Yes USB data transmission line voltage (D+,D-) 0-3.30V Yes Yes Yes Storage 10 groups of data Yes Yes Yes Time 99 hours 59 minutes 59 seconds, resolution ratio:1s Yes Yes Yes Support fast charge protocol Support USB2.0 data transmission function, support qc1.0/2.0/3.0 quick charging protocol (type-A) Yes   Yes   Support USB2.0 data transmission function, support qc1.0/2.0/3.0 quick charging protocol (type-C)   Yes Yes Package List: 1 x USB Tester 1 x Instruction Manual