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.Standard Features: Nominal voltage 24 VDC Tamperproof field selectable candela options of 15, 30, 75, 95, 115 & 150 Unit Dimensions: 6" (15.24 cm) x 2.6" (6.604 cm) Super-Slide® Bracket, Ease of Supervision Testing Checkmate® Instant Voltage Verification Prewire entire system, install mounting bracket, then install signals Documented lower installation and operating costs Input terminals 12 to 18 AWG Horn/strobe switch selection for high or low dBA Horn/strobe switch selection for 2400Hz or mechanical tone Horn/strobe switch selection for continuous or temporal 3 Synchronize strobe and/or horn with Gentex AVSM Control Module Silence audible while visual appliance will remain flashing Tamperproof re-entrant grill Surface mount with the GCSB (Gentex Ceiling Surface Mount Box) Faceplate available in red or off-white Ceiling mount