The Commander4 Series is a ceiling mount strobe or horn/strobe combination that offers dependable audible and visual alarms and the lowest current consumption. The GCS/GCC offers tamperproof field selectable candela options of 15, 30, 75, 95, 115 and 150 candela. The GCC horn offers a continuous or synchable temporal three in 2400Hz and mechanical tones. All tones are easy for the professional to change in the field by using switches. The Commander4 Series comes standard with the 4” mounting plate which incorporates the popular Super-Slide® feature that allows the installer to easily test for supervision. The product also features a locking mechanism which secures the product to the bracket without any screws showing. The Commander4 also features the patented Checkmate® instant voltage verification feature which allows the installer to check the voltage drop draw and match it to the blueprint. The GC Series appliances are ANSI/UL 464, ANSI/UL 1971, CAN/ULC S525 and/or CAN/ULC S526 listed for use with fire protective systems and are warranted for three years from the date of purchase.