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⚡ Plug in. Light up. Stay safe. The pro’s choice for wiring confidence.
The Klein Tools RT210 GFCI Receptacle Tester is a compact, hand-powered device designed to detect common wiring issues in standard and GFCI outlets. Featuring LED indicators and a built-in wiring chart, it quickly identifies faults like open ground, reverse polarity, and confirms GFCI operation. Certified to UL and CSA standards, it withstands drops up to 6.6 feet and operates reliably between 32°F and 140°F. Trusted by professionals for over 160 years, this tester combines durability, precision, and ease of use to ensure electrical safety in any setting.












| ASIN | B01AKX8L0M |
| Best Sellers Rank | 449,313 in DIY & Tools ( See Top 100 in DIY & Tools ) 511 in Circuit Testers |
| Brand | KLEIN TOOLS |
| Colour | Black/Orange |
| Compatible Devices | Standard and GFCI Receptacles |
| Country Of Origin | China |
| Customer Reviews | 4.8 4.8 out of 5 stars (8,610) |
| Global Trade Identification Number | 00092644690273 |
| Included Components | RT210 |
| Item Dimensions | 13.5 x 9.7 x 3.8 centimetres |
| Item Length | 1.62 Inches |
| Item Type Name | GFCI Receptacle Tester Klein Tools RT210 |
| Item Weight | 1.9 Ounces |
| Item Width | 1.88 Inches |
| Manufacturer | Klein Tools |
| Manufacturer Part Number | RT210 |
| Measurement Type | Voltmeter |
| Minimum Operating Voltage | 110 |
| Model Number | RT210 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Power Source | Hand Powered |
| Product Warranty | Two years from the date of purchase. |
| Specification Met | Cat Ii 300v |
| Style Name | GFCI Testing |
| UPC | 092644690273 |
| Unit Count | 1.0 count |
| Upper Temperature Rating | 140 Degrees Fahrenheit |
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