The GHSLF low frequency notification appliance, ideal for meeting NFPA 72 low frequency requirements for commercial sleeping areas. The horn offers a low frequency temporal 3 tone with a jumper for choosing between normal or loud decibel levels. A temporal 4 tone pattern is available when used with the Gentex GTSM Synchronization Module. The GHSLF is available with a fixed 15, 110 or 177 candela strobe to meet the installation requirements. The GHSLF is listed to ANSI/UL 1971, ANSI/UL 464, CAN/ULC S525 and CAN/ULC S526 and is warranted for three years from date of purchase.