Federal Signal SmartSiren with SignalMaster Control is an electronic siren, emergency warning light control and SignalMaster traffic advisory switching all in one model! Separate amplifier/relay unit connected via RJ-11 cable to super slim control head for "air-bag wise" installation. State-of-the-art microprocessor technology provides high perfomance and versatility; user can configure in field. Siren functions include wail, yelp, hi/lo, manual, horn ring transfer, radio rebroadcast, TAP II, and PA; power versatility (58-, 100-, or 200-watt) meets Class A with Federal speaker. Control lghts and other auxiliary functions; seven signaling patterns and eight relay outputs are available.