Model AV1-LED is a combination audible/visual signal featuring a 100% polycarbonate housing that is rated for Type 3R rain-tight applications.All AV1-LED units utilize a twist-and-lock lens design to allow for tool-free access to the LED. The fresnel lens provides superior visibility in all directions.The integrated buzzer can be set to continuous or intermittent and provides 85 dBA at 10' (95 dBA at 1 m). The unit can operate in one of two ways: LED/buzzer combination or LED only. The LED can be programmed to steady or two different flash patterns (60 FPM or 75 FPM). This is achieved through jumpers on the PC board.Each unit is factory-assembled with two color-coded leads. If desired, the user can remove the leads and connect directly to the terminal block located in the base of the unit.