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

⚡Non-contact voltage detection

📏Auto-ranging for precise readings

🔋Auto power-off saves battery

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A$131

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Description

⚡ Power Your Precision with Klein’s Ultimate Clamp Meter!

HANDS FREE CONVENIENCE - Test lead holder & optional magnetic hanger keep your hands free and workflow smooth
SMART POWER MANAGEMENT - Auto power-off after 10 minutes extends battery life for long job days
CRYSTAL CLEAR VISIBILITY - Backlit LCD ensures accurate readings even in dim environments
VERSATILE MEASUREMENT MASTERY - Clamp AC current, test AC/DC voltage, resistance & continuity all-in-one
EFFORTLESS NON CONTACT VOLTAGE TESTING - Integrated NCVT in clamp jaw for safe, quick checks

The Klein Tools CL120 Digital Clamp Meter is a professional-grade, auto-ranging electrical tester designed for electricians and managers who demand accuracy and efficiency. It measures up to 400 Amps AC current via clamp, detects voltage without contact, and tests AC/DC voltage, resistance, and continuity with test leads. Featuring a backlit display for low-light conditions, smart auto power-off, and convenient hands-free options, it’s built tough with over 160 years of Klein’s trusted craftsmanship to keep you ahead on every job.

Specifications

ASIN	B08CP6GL49
Best Sellers Rank	#4,600 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #6 in Voltage Testers
Brand Name	KLEIN TOOLS
Color	green
Compatible Devices	Test Leads
Customer Reviews	4.8 4.8 out of 5 stars (1,245)
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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