Klein ET900 USB Digital Meter, USB-A (Type A)
Klein ET900 USB Digital Meter, USB-A (Type A)

Klein Tools ET900 Description
The Klein Tools ET900 is a USB digital meter for common standard USB-A (Type 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 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.
Klein Tools ET900 Includes
- (1) USB Digital Meter
Klein Tools ET900 Features
- 3 to 20V DC; Current: 0.05 to 3A
- 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
Klein Tools ET900 Specifications
| Elapsed Time | Up to 999 Hours, 59 Min, 59 Secs |
| Current | 0.05 to 3A |
| Overall Height | 0.56" (14.4 mm) |
| Overall Width | 1.25" (31.8 mm) |
| Material | Polymer |
| Drop Protection | 2 m (6.6') |
| Type | USB-A (Type A) |
We offer a 30-day return window for unused, unworn items in their original condition. If your item arrives damaged or incorrect, please get in touch with us within 7 days with photos so we can resolve it quickly.
Lineroots is not responsible for lost or stolen packages marked as delivered. Any reshipments for incorrect addresses will be at the customer’s cost. Approved returns are processed within 3–5 business days after we receive your package