Edwards 757-5A-T Temporal Horn Strobe Integrity Series Temporal Horn/Strobe is perfect for life safety applications as an alert and alarm signal, especially to notify the hearing impaired. The horn emits a piercing low frequency sound that easily heard above moderate ambient noise levels. The Edwards 757-5A-T Temporal Horn Strobe is available with a red or white textured finish. With its ingenious mounting sub-plate, the horn is firmly held in place with a single screw ensuring a quick, attractive installation. A separate trim plate is not required for flush mounting. The strobe operates on any existing two-wire signal circuit. There are jumpers for selecting either a temporal or steady tone, and high or low volume. The strobes come shipped with standard wall mount style “FIRE” lens markings.