How high of voltage will it test ?

The included paperwork says 600 Volt. That’s kind of an industrywide cut off point between “normal“ power versus what is generally considered to be high voltage. I would feel comfortable using it to test 480 V all day long. I would not use it over 600 V under any circumstances.

Does it measure volts in millivolts in DC? How many digits does it show after the decimal?

Yes. 3 decimal points after whole volts. I.e.; 1.419 volts for a AA battery

Is a case furnished with the meter?

My CL-120 cane with a fabric zip case

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Klein Tools CL120 Digital Clamp Meter, Auto-Ranging 400 Amp AC, AC/DC Voltage, Resistance, Continuity, Non-Contact Voltage Tester Detection

Product ID: 222333460

Details

Brand
KLEIN TOOLS
Color
green
Item Weight
0.61 Pounds
Power Source
Battery
Style
Clamp Meter

📏Auto-ranging for precise measurements

🔋Auto power-off saves battery life

🛠️Non-contact voltage detection

Rp3132078

Duties & taxes included

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Description

⚡ Empower your electrical game with Klein’s pro-grade precision!

SAFETY FIRST ALWAYS - CAT III/CAT IV safety caps and double insulation rating protect you on high-voltage jobs.
ALL IN ONE POWERHOUSE - Measures AC/DC voltage, current, resistance, continuity plus non-contact voltage testing in one sleek tool.
HANDS FREE EFFICIENCY - Optional magnetic hanger and built-in test lead holder keep your hands free for the job.
WORK ANYWHERE ANYTIME - Backlit LCD display guarantees clear visibility even in dimly lit environments.
PRECISION MEETS CONVENIENCE - Auto-ranging tech ensures spot-on readings every time, no manual range hunting.

The Klein Tools CL120 Digital Clamp Meter is a professional-grade, auto-ranging electrical tester designed for electricians and serious DIYers. It measures up to 400A AC current via clamp, AC/DC voltage, resistance, and continuity with test leads, plus features integrated non-contact voltage detection. With a backlit LCD, test lead holder, optional magnetic hanger, and safety-certified components, it delivers reliable, hands-free operation and precise readings in any lighting condition. Built for durability and accuracy, it’s a trusted tool backed by over 160 years of Klein’s craftsmanship.

Specifications

ASIN	B08CP6GL49
Best Sellers Rank	#8,589 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #9 in Voltage Testers
Brand Name	KLEIN TOOLS
Color	green
Compatible Devices	Test Leads
Customer Reviews	4.7 4.7 out of 5 stars (1,275)
Global Trade Identification Number	00092644692833
Included Components	Digital Clamp Meter, AC Auto-Ranging 400 Amp
Item Dimensions	8.45 x 3.51 x 1.51 inches
Item Type Name	Clamp Meters
Item Weight	0.61 Pounds
Manufacturer	Klein Tools
Maximum Operating Voltage	600 Volts
Measurement Type	Ammeter, Voltmeter, Ohmmeter
Minimum Operating Voltage	9 Volts
Model	CL120
Part Number	CL120
Power Source	Battery Powered
Specification Met	Double Insulation Safety Rating, Ce Certified
Style Name	Clamp Meter
UPC	092644692833
Unit Count	1.0 Count
Upper Temperature Rating	1000 Degrees Celsius
Warranty Description	See Manufacturer website

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TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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