The features of this siren are easily selected at installation using an internal DIP switch. The SA-500M Cruiser Mechanical siren is designed to power �one or two 100-watt siren speakers �and includes internal fusing, short circuit, high voltage and reverse polarity protection systems. An output indicator is also included for diagnostic purposes. A detachable wiring connector with screw-down terminals and optional mounting brackets for the siren and PA microphone are included, as well. As with all Carson Sirens products, the SA-500M Cruiser Mechanical is backed by a no-hassle 5 year limited warranty.