Zircon Breaker ID Pro - Commercial and Industrial Complete Circuit Breaker Finding Kit/Compatible with Outlets up to 270 Volts/Professional Accessories Included FFP Zircon Breaker ID Pro circuit breaker finding kit includes clips, blades, and other accessories allowing easy access to most outlets, including industrial 230 and 240 volt Patented technology of this circuit finder eliminates false positives making it quick and efficient to scan, identify, and label all breakers eliminating trial-and-error work Isolate circuits for repair or replacement, or work on specific circuits without interrupting others or accidental shutoffs Circuit breaker identifier is built with automatic sensitivity adjustment, no knobs or dials needed Vital for contractors and electricians alike, this portable kit and its accessories come in a protective metal case making it easy to carry from job to job