Home

Explore

View Cart

Deals

Saved

Suggested searches

Plant-based protein powders
Vegan leather handbags
Bedroom decor
Waterproof jackets
Hoodies

Learn more about how we use your data to personalize your experience and ads. Recommendations are for informational purposes only.

EIO.com

Products

Products

EIO.com

Klein Tools RT390 Circuit Analyzer

4.5 (1,234)

Sold 100+ last 30 days

20% off first order

$159.99

Color

Black

Quantity

Product description loading

Product description loading

This is the product description text that will appear here.

Shopping designed around you.

Start selling

For brands

For creators

Build your store

Information

Shop Pay

Help center

Social

X (Twitter)

Instagram

Legal

Terms of Service

Privacy Policy

Your Privacy Choices

Powered by

|

Start selling for free

Language

© Shopify Inc. 2026

Quantity

1

Description

General Information Manufacturer Klein Tools Part Number RT390 Product Type Circuit Analyzer California Residents Proposition 65 Warning Specifications Features Circuit Analyzer with large color L...

Delivery & Returns

EIO.com

EIO.com

EIO.com

4.6 (393)

You might also like

Haus of Tools

Klein Tools RT390 Circuit Analyzer

(2)

Klein ET450 Advanced Circuit Tracer Kit

Hand Tool Outlet

Klein ET450 Advanced Circuit Tracer Kit

(1)

EIO.com

Klein Tools ET310KIT Circuit Breaker Finder Kit

(1)

Klein ET310 Digital Circuit Breaker Finder with GFCI Outlet Tester

33% off

My Tool Store

Klein ET310 Digital Circuit Breaker Finder with GFCI Outlet Tester

13% off

Quality Industrial Safety

GFCI Outlet Tester

(1)

Addicted to tools

Klein Tools Circuit Tracer ET450AU

(2)

EIO.com

Klein Tools ET450 Advanced Circuit Tracer Kit

EIO.com

Klein Tools ET310TRANS Replacement Transmitter for ET310

Klein ET450 Advanced Circuit Tracer Kit

20% off

Toolup

Klein ET450 Advanced Circuit Tracer Kit

Haus of Tools

Klein Tools MM320KIT Digital Multimeter Electrical Test Kit

(3)

31% off

Quality Industrial Safety

Digital Multimeter Electrical Test Kit

(1)

Klein 69149P Electrical Test Kit with MM300 Multimeter, NCVT-1P Non-Contact Voltage Tester and RT105 Receptacle Tester

37% off

Toolup

Klein 69149P Electrical Test Kit with MM300 Multimeter, NCVT-1P Non-Contact Voltage Tester and RT105 Receptacle Tester

EIO.com

Klein Tools CL490 400A AC/DC Dual-Display Auto-Ranging Digital Clamp Meter

Haus of Tools

Klein Tools VDV501-852 Scout® Pro 3 Tester with Locator Remote Kit

Haus of Tools

klein Tools NCVT2PKIT Dual Range NCVT with Receptacle Tester Electrical Test Kit

Klein Tools RT390 Circuit Analyzer

Tool Nut

Klein Tools RT390 Circuit Analyzer

Haus of Tools

Klein Tools RT250KIT Premium Non-Contact Voltage and GFCI Receptacle Electrical Test Kit

EIO.com

Klein Tools 69105 Circuit Tester

Haus of Tools

Klein Tools ET310 Digital Circuit Breaker Finder with GFCI Outlet Tester

(5)

Klein ET310 Digital Circuit Breaker Finder with GFCI Outlet Tester

33% off

Toolup

Klein ET310 Digital Circuit Breaker Finder with GFCI Outlet Tester

klein tools mm320kit electrical test kit - package contents

Battery Junction

Klein Tools Electrical Test Kit

Klein CL120KIT Clamp Meter Electrical Test Kit

Tool Nut

Klein CL120KIT Clamp Meter Electrical Test Kit

EIO.com

Klein Tools CL220VP Premium Meter Electrical Test Kit

Haus of Tools

Klein Tools NCVT5KIT Dual Range NCVT and GFCI Receptacle Tester Electrical Test Kit

(1)

21% off

Quality Industrial Safety

Premium Dual-Range NCVT and GFCI Receptacle Tester Electrical Test Kit

(1)

Haus of Tools

Klein Tools 69355 Digital Multimeter Premium Electrical Test Kit with Non-Contact Voltage Tester, Receptacle Tester, Test Leads

Haus of Tools

Klein Tools CL120KIT Electrical Tester / Auto-Ranging Digital Clamp Meter Kit

(1)

EIO.com

Klein Tools VDV500-223 Digital Tracing Probe

Harry J. Epstein Co.

Klein Non-Contact Voltage Tester (NCVT-1P)

(2)

Haus of Tools

Klein Tools VDV501-851 Cable Tester Kit with Scout ® Pro 3 Tester, Remotes, Adapter, Battery

Haus of Tools

Klein Tools RT310 AFCI and GFCI Outlet and Device Tester for North American AC Electrical Outlet Receptacles

Haus of Tools

Klein Tools IR1KIT Infrared Thermometer with GFCI Receptacle Tester

EIO.com

Klein Tools RT110 Receptacle Tester

Klein Tools ET310 Digital Circuit Breaker Finder with GFCI Outlet Tester - Edmondson Supply

33% off

Edmondson Supply

Klein Tools ET310 Digital Circuit Breaker Finder with GFCI Outlet Tester

Haus of Tools

Klein Tools RT210 GFCI Receptacle Tester for North American AC Electrical Outlet Receptacles

Haus of Tools

Klein Tools 69105 Circuit Tester

(1)

Haus of Tools

Klein Tools RT110 Receptacle Tester for North American AC Electrical Outlet Receptacles

(1)

EIO.com

Klein Tools 69355 Digital Multimeter Premium Electrical Test Kit with Non-Contact Voltage Tester, Receptacle Tester, Test Leads

Klein Tools ET310TRANS Replacement Transmitter for ET310 - Edmondson Supply

34% off

Edmondson Supply

Klein Tools ET310TRANS Replacement Transmitter for ET310

Green Bird Electric Solutions Inc.

Klein Tools ET450 Advanced Circuit Tracer Kit

Haus of Tools

Klein Tools CL220VP Premium Meter Electrical Test Kit

Haus of Tools

Klein Tools ET250 Voltage Meter, AC Voltage and DC Voltage Tester

EIO.com

Klein Tools VDV512-100 Coax Explorer 2 Tester

KLEIN TOOLS | Advanced Electrical Circuit Breaker Finder and Wire Tracer Kit with Case | #ET450

Destiny Solutions

KLEIN TOOLS | Advanced Electrical Circuit Breaker Finder and Wire Tracer Kit with Case | #ET450| ET-450

Complete Klein Tools ET450 circuit tracer kit with transmitter, receiver, test leads, plug adapter, batteries, and hard case for organized transport.

1 Top Tools

Klein Tools Circuit Tracer Kit ET450 12V To 480V Advanced Wire Finder (12V to 480V, IP42, 6 ft Drop Protection, Electricians, Tracing Breakers)

EIO.com

Klein Tools ET310 Digital Circuit Breaker Finder with GFCI Outlet Tester

Klein Tools ET310KIT Circuit Breaker Finder Kit

Tool Nut

Klein Tools ET310KIT Circuit Breaker Finder Kit

EIO.com

Klein Tools IR1KIT Infrared Thermometer with GFCI Receptacle Tester

Klein Tools ET310 Digital Circuit Breaker Finder with GFCI Outlet Tester

Tool Nut

Klein Tools ET310 Digital Circuit Breaker Finder with GFCI Outlet Tester

A flat-lay arrangement of the Klein Tools circuit breaker finder kit components, including the orange and black receiver wand, the GFCI outlet transmitter, a light socket adapter, a 3-prong ground adapter, alligator clip adapter, a 9V battery, and a black zippered hard case.

1 Top Tools

Klein Tools Circuit Breaker Finder ET310KIT Digital Locator (GFCI Outlet Tester Light Socket Adapter Clips Case Safety Testing Diagnostic Tool)

EIO.com

Klein Tools ET350 4-in-1 Digital Circuit Breaker Finder

Haus of Tools

Klein Tools NCVT1PKIT Non-Contact Voltage and GFCI Receptacle Test Kit

EIO.com

Klein Tools CL120KIT Electrical Tester / Auto-Ranging Digital Clamp Meter Kit

Haus of Tools

Klein Tools NCVT1XTKIT Non-Contact Voltage and GFCI Receptacle Premium Test Kit

Klein Tools ET450 Advanced Circuit Tracer Kit - Edmondson Supply

20% off

Edmondson Supply

Klein Tools ET450 Advanced Electrical Circuit Breaker Finder and Wire Tracer Kit and Case

Klein Tools ET310TRANS Replacement Transmitter for ET310 Circuit Breaker Finder

Tool Nut

Klein Tools ET310TRANS Replacement Transmitter for ET310 Circuit Breaker Finder

Haus of Tools

Klein Tools NCVT-1 Non-Contact Voltage Tester with Low Battery Indicator and Auto Shutdown

EIO.com

Klein Tools VDV500-705 Tone & Probe Test and Trace Kit

Haus of Tools

Klein Tools VDV501-853 Scout® Pro 3 Tester with Test + Map Remote Kit

(1)

Haus of Tools

Klein Tools 69411 Circuit Breaker Finder Accessory Kit

(1)

EIO.com

Klein Tools RT210 GFCI Receptacle Tester

EIO.com

Klein Tools NCVT5KIT Dual Range NCVT and GFCI Receptacle Tester Electrical Test Kit

EIO.com

Klein Tools ET270 Digital Multi-Tester DMM with Receptacle Tester

10% off

Mrosupreme.com

Klein Tools Circuit Breaker Tester

Haus of Tools

Klein Tools RT250 GFCI Receptacle Tester with LCD Display, for Standard 3-Wire 120V Electrical Outlets

(1)

Haus of Tools

Klein Tools ET450 Advanced Circuit Tracer Kit

(21)

9% off

Quality Industrial Safety

Receptacle Tester

EIO.com

Klein Tools CL320KIT HVAC Kit

15% off

Quality Industrial Safety

Clamp Meter Electrical Test Kit

Haus of Tools

Klein Tools CL120VP Clamp Meter Electrical Test Kit

(4)

Klein ET250 AC/DC Voltage/Continuity Tester

17% off

Toolup

Klein ET250 AC/DC Voltage/Continuity Tester

EIO.com

Klein Tools VDV501-851 Cable Tester Kit with Scout ® Pro 3 Tester, Remotes, Adapter, Battery

EIO.com

Klein Tools CL120 Digital Clamp Meter, AC Auto-Ranging 400 Amp

Haus of Tools

Klein Tools ET600 Insulation Resistance Tester

Haus of Tools

Klein Tools NCVT7 Non-Contact Voltage Tester with Signal Strength, 12-1000V AC

Klein Tools RT210 GFCI Receptacle Tester - Edmondson Supply

24% off

Edmondson Supply

Klein Tools RT210 GFCI Outlet Tester

EIO.com

Klein Tools NCVT1PKIT Non-Contact Voltage and GFCI Receptacle Test Kit

EIO.com

Klein Tools RT250KIT Premium Non-Contact Voltage and GFCI Receptacle Electrical Test Kit

Haus of Tools

Klein Tools ET310KIT Circuit Breaker Finder Kit

(2)

19% off

Quality Industrial Safety

GFI RECEPTACLE TESTER LCD

(1)

Haus of Tools

Klein Tools ET350 4-in-1 Digital Circuit Breaker Finder

EIO.com

Klein Tools ET45VP Voltage and GFCI Receptacle Tester, AC/DC Voltage Electrical Test Kit

Klein ET350 4-in-1 Digital Circuit Breaker Finder with Outlet Tester and NCV

29% off

Toolup

Klein ET350 4-in-1 Digital Circuit Breaker Finder with Outlet Tester and NCV

Haus of Tools

Klein Tools ET310TRANS Replacement Transmitter for ET310

(2)

Klein 69355 Premium Electrical Kit Includes MM320-Digital Multimeter, NCVT3P-Voltage Tester, RT250-Receptable Tester

Tool Nut

Klein 69355 Premium Electrical Kit Includes MM320-Digital Multimeter, NCVT3P-Voltage Tester, RT250-Receptable Tester

21% off

Quality Industrial Safety

Premium Clamp Meter Electrical Test Kit

EIO.com

Klein Tools 69360 Alligator Clips and Outlet Tabs

22% off

Quality Industrial Safety

Test Kit with Multimeter, Non-Contact Volt Tester, Receptacle Tester

Klein ET310TRANS Replacement Transmitter for ET310

23% off

Toolup

Klein ET310TRANS Replacement Transmitter for ET310

Klein VDV501-851 Scout Pro 3 Tester Starter Kit

24% off

Toolup

Klein VDV501-851 Scout Pro 3 Tester Starter Kit