






⚡ Find your circuit breaker faster than your coffee break!
The Klein Tools ET300 Circuit Breaker Finder is a professional-grade device designed to quickly and accurately identify 120V electrical circuit breakers. Featuring a rechargeable lithium-ion battery with over 10 hours of runtime, Bluetooth 4.2 connectivity up to 32.8 feet, and a rugged IPX-rated water-resistant design with drop protection, it’s built to withstand demanding jobsite environments. Lightweight and versatile, it offers hands-free operation and multiple mounting options, making it an essential tool for electricians and professionals who value precision and efficiency.






| Brand | KLEIN TOOLS |
| Power Source | Battery Powered |
| Style | Circuit Breaker Finder |
| Color | Original Version |
| Item Weight | 3.2 Ounces |
| Item dimensions L x W x H | 0.5 inches |
| Min. Operating Voltage | 90 Volts |
| Specification Met | CE, NIST, RoHS, UL |
| Measurement Type | Voltmeter |
| UPC | 745654152797 635665195107 757073227468 785533725513 696504812708 787721821755 092644693021 640025709528 756635040002 733353249337 |
| Manufacturer | Klein Tools |
| Global Trade Identification Number | 00092644693021 |
| Part Number | ET300 |
| Item Weight | 3.2 ounces |
| Item model number | ET300 |
| Batteries | 1 Lithium Ion batteries required. (included) |
| Is Discontinued By Manufacturer | No |
| Size | 1 pack |
| Voltage | 120 Volts |
| Item Package Quantity | 1 |
| Measurement Accuracy | not listed |
| Included Components | (1) 9V Transmitter Battery |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Lithium Ion |
| Warranty Description | Klein electronic test and measurement devices (and accessories), manufactured and sold for commercial or industrial uses, are warranted to be free from defects in materials and workmanship for two years from the date of purchase (unless otherwise noted on the product packaging). |
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