SA-400 Rugged 100/200 watt electronic siren amp with dip switch options including the selection of desired siren tones. Reliable six position rotary switch features Wail, Yelp, Phaser and Air Horn siren tones with push button override and optional Two-Tone/HiLO sound. Pa has noise canceling mic. Hands free Horn Ring Cycler 2 No hassle 5 year limited warranty. Size 6 1/8"W x 2 1/2"H x 5 3/8"D