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Klein Tools - For Professionals Since 1857



  • Circuit Breaker Finder can find the corresponding circuit breaker of any 120V standard electrical outlet quickly, accurately, and automatically
  • Flashing arrow indicator for easy identification
  • Strong transmitter reaches distances up to 1000 feet
  • 90 to 120V operation
  • Microprocessor controlled for more reliable identification
  • Auto power-off feature saves battery life
  • Accessory kit (Cat. No. 69411, sold separately) includes light socket adapter and alligator clip assembly
CETLUS Product Icon
JPG (High Resolution) et300_photo.jpg
PNG (Transparent Background) et300.png
Interactive Catalog

The Klein Tools ET300 Digital Circuit Breaker Finder quickly, accurately, and automatically finds the corresponding circuit breaker of any standard 120V electrical outlet. The flashing arrow indicator lets you quickly identify when you've got a hit. The strong transmitter reaches up to 1000 feet. The auto power-off feature saves battery life and gives you one less thing to worry about.

Overall Length:
Receiver: 6.00'' (15.2 cm); Transmitter: 2.8'' (7.1 cm)
Overall Height:
0.91'' (2.3 cm)
Overall Width:
Receiver: 2'' (5.1 cm); Transmitter: 1.89'' (4.8 cm)
(1) 9V Transmitter Battery
3.2 oz (91 g)
Additional Information
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