Patlite rt-24e-r+fc015 smart alert plus rotating beacon & horn w/32 sounds, red light, dc24v the rt series is a large horn and rotating light combination for increased plant floor coverage. features: 32 sounds are pre-recorded in one unit for enhanced durability and safety in the work environment built-in alarm: adjustable audible sound up to 105db at 1m with volume control installation: indoorsupright, inverted, sideways; outdoorsupright only. (do not install the horn facing upward)