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? 2-Pot Current Adjustment: This Electronic USB Load Tester endures the wide voltage range (DC3-21V) and current range (0-3A). The two knobs are for coarse-current (0-3A) and fine-current (+/-0.2A) adjustable trimming, which can be used for quick and accurate current controlling. The screw terminal is for external voltage measurement, allowing you to test batteries or other load sources. (Please make sure both 2 knobs of the multimeter are turned to counterclockwise fully before testing.)
? A Combination Of USB Load and Multimeter: Featured with OLED Screen Display, this Constant Current USB Load Tester supports 35W power continuously aging discharge testing. It enables you to monitor the value of the Current, Charging Voltage-Discharge, Resistance, Capacitance, Temp of the Boards and Time. While it can also calculate the capacity of the battery (tablets or smartphones) and power bank in mah (ma hour), in wh (w hour). One button achieves the data clearing and resetting.
? Comprehensive Pack: Coupled with a QC2.0/QC3.0 trigger, this Multimeter can test QC2.0/QC3.0 fast charging voltage, loading a USB PD source at 5V/3A, 9V/2A, 12V/1.25A and 20V/1.5A for more accurate testing. (Note: The trigger can just work with the QC 2.0/3.0 Quick Chargers, instead of the ordinary chargers.)
? Versatile USB Electronic Load: The various USB ports on the multimeter support most of USB Cables load testing, with the iphone5s/6s, Android micro-USB, mini USB or USB-C 3.0 interfaces. By this current size, you can measure the impedance of micro-USB cables and distinguish charge data cable quality is good or bad.
? Advanced Temperature Controlling System: Using high-grade aluminum radiator with copper roll fan, to disperse the heat and prolong the life of the load. (The intelligent cooling fan will start working when temperature is higher than 55°C, and automatically stops when temperature is under 45°.)