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Item #:
44668566
Klein Tools USB Power Meter, USB-A Digital Meter for Voltage, Current, Capacity, Energy Resistance ET900
Item #:
44668566
0 ratings
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Imported from UK store
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The Klein Tools ET900 accurately and reliably measures and displays USB port voltage, current, capacity, energy, and resistance simultaneously.
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Note: Step 1 Voltage Transformer required for using electronics products of UK store (230 V). Recommended power converters Buy Now.
What Stands Out
Real-Time Monitoring
Measures voltage, current, and energy consumption in real-time, giving users immediate feedback on their USB device's performance for optimized power management.
User-Friendly Design
Compact and lightweight with an intuitive interface, making it easy for both professionals and hobbyists to understand and utilize, enhancing accessibility.
Durable Build
Constructed with high-quality materials for long-lasting durability, ensuring reliable performance under various conditions, perfect for everyday use or tough job sites.
Product Details
| Item Weight | 0.3 lbs (140 grams) |
Who Should Buy?
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DIY Enthusiasts
Ideal for hobbyists wanting to monitor power consumption and optimize devices for efficiency while building projects.
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Technicians Specializing in Electronics
Perfect for professionals needing precise voltage and current readings to diagnose and troubleshoot electronic equipment effectively.
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Frequent Travelers
Useful for travelers wanting to track power usage and capacity while charging devices on the go, ensuring efficiency.
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Casual Users
Not suitable for occasional users who may not require detailed monitoring of power metrics in their daily routine.
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High-Powered Devices
Inapplicable for heavy-duty users needing to measure voltage and current for high-powered tools or equipment beyond USB limits.
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Basic Smartphone Users
Not ideal for smartphone users who may not need advanced metrics beyond standard charging capabilities for everyday use.
Product Description
Klein Tools USB Power Meter, USB-A Digital Meter for Voltage, Current, Capacity, Energy Resistance ET900
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Customer Questions & Answers
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Question:
What is the voltage and current range of the Klein Tools ET900?
Answer: The voltage range is 3 to 20V DC, and the current range is 0.05 to 3A. -
Question:
How many readings can the device store and recall?
Answer: It can store and recall up to 10 readings. -
Question:
Does the device require batteries to operate?
Answer: No, the Klein Tools ET900 draws power from the USB source and does not require batteries. -
Question:
Will the unit test 100W and above?
Answer: The rating is Input 3VDC - 20VDC and 0A - 3A, so it will not test to 100W. -
Question:
Does the ET920 cover USB-C 3.1 Gen 2 and Thunderbolt 3?
Answer: The ET920 tests USB under load, so with a converter, it should test the voltage and amperage.
KLEIN TOOLS Voltage Testers Editorial Review
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“The product received very good packaging & safe…Thank You”
16 June 2026 · via Trustpilot
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“Accurate delivery timing given”
16 June 2026 · via Trustpilot
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“Not madly expensive like I thought, and much quicker than promised.”
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6/7/2026 · via Trustpilot
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“The process was smooth, with clear communication and timelines. This was my 1st purchase and I am really impressed. I will definitely be coming back.”
12 June 2026 · via Trustpilot
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Features & Benefits
- Measures voltage, current, capacity, energy, and resistance concurrently
- Functions with any USB-A port capable of delivering power
- Requires no batteries as it draws power from the source
- Can store and recall up to 10 readings
- Features hi-resolution LCD for clear visibility in low light
- Rugged, pocket-sized, and lightweight design for portability
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