The model AV1-LED warning light is a combination audible/visual signal. The warning light features a 100% polycarbonate housing that is rated for Type 3R rain-tight applications. All AV1-LED alert light units feature 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 provides 85 dB output at 10 feet. The unit can operate in two ways: flashing/buzzer combination or flashing only. The LED flash pattern can be field adjusted to 60 or 75 fpm, via a jumper 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 at the base of the unit.