The Klein Tools ET910 is a USB digital meter and tester combination for most common USB-A ports, including Qualcomm Quick Charge® ports. It accurately and reliably measures and displays the USB port voltage, current, capacity, energy, and resistance simultaneously. It can also test the maximum current delivery capability of the USB port with built-in fixed loads so user need not connect to an external load. It will function with any USB-A port that has the ability to deliver power. It requires NO batteries as it draws power from the power source to function.

• Features
• 3 to 20V DC; Current - 0.05 to 3A (monitoring mode)
• Built-in test loads of 0.5A, 1A, 2A, and 3A; no external test load required
• Continuously monitor up to 1000 hours of voltage, current, capacity/charge delivered, energy, and resistance (calculated)
• Tests most common standard USB-A ports, including Qualcomm Quick Charge® ports
• Store and recall up to 10 readings
• Voltage and current overload detection
• Hi-resolution LCD for clear visibility in environments with low ambient lighting
• Durable cable to allow easy access to hard-to-reach ports
• Rugged, pocket-sized, and light weight Klein industrial design stands up to jobsite demands
• Built to withstand a 6.6-Foot (2m) drop
• No batteries needed; powered by the USB port being tested
• Current Test Loads: 0.5A, 1A, 2A, 3A
• Warnings
• To ensure safe operation and service of this meter, follow all instructions. Failure to observe warnings can result in severe injury or death.
• This meter will NOT display current below 50 milliamperes, even if it is allowing this to pass through. NOTE: The display will show zero current.
• Do NOT use with ports that operate outside of the rated voltage and current. NEVER use on a circuit with voltage or current that exceeds the maximums specified for this device.
• Do NOT use during electrical storms or in wet weather. Do NOT use if meter appears damaged. Use caution when working with voltages above 25V RMS or 24V DC. Such voltages pose a shock hazard.

• Specifications
• Capacity Used : 99,999mAh Maximum
• Display : LCD
• Ingress Protection : IP20
• Type : USB-A (Type A)
• Energy Delivered : 999Wh Maximum
• Resistance : 400 ohms Maximum
• Voltage : 3 to 20V DC
• Application : USB Port Voltage, Current, Capacity, Energy, Resistance (Calculated), Max Current
• USB Compatibility : USB-A; Qualcomm Quick Charge® Compatible
• Elapsed Time : Up to 999 Hours, 59 Min, 59 Secs
• Drop Protection : 2 m (6.6')
• Overall Length : 4.31" (11 cm)
• Overall Height : 0.98" (2.5 cm)
• Overall Width : 2.15" (5.5 cm)
• Weight : 2.80 oz (79.4 g)
• Material : Polymer
• Current : 0.05 to 3A
• Accuracy : Voltage - 3 to 20V DC +/- 1% (+/-2 Bytes); Current - 0.05 to 3A +/- 1% (+/-2 Bytes)
• Item Height : 0.9800 in
• Item Width : 2.1300 in
• Item Depth : 11.2100 in
• Item Weight : 0.1750 lbs