Dual function circuit breaker. Features space and labor savings. Engineered to meet NEC (National Electrical Code) requirements. Combines two critical technologies - combination arc fault protection and ground fault protection in one easy to install device. Integrated with time saver diagnostics, a unique feature that provides additional circuit information and minimizes troubleshooting at the touch of a button. Compatible with QO load centers only. 120 volt, 10,000 AIR. ANSI (American Nation Standards Institute) certified and UL (Underwriter's Laboratories) listed. Limited lifetime warranty.