Two sirens in one, the MAGNUM has two separate modes of operation each offering its own distinct tones. It incorporates the use of two isolated amplifiers in one 100 watt speaker each for a total of 200 watts of output. Perfect for dash or panel mounting with use of the telephone type connection made between the amp box and control head. LED speaker diagnostics alo quick troubleshooting. Rotary switch selectable operating modes are Wail, Yelp, Hands Free, Phaser, Manual, Alert and Radio. Push buttons operate Manual and Air Horn. Operating tones are Wail, Yelp, Air Horn, Phaser, Manual and Two-Tone. Positive and negative switching for AUX and Park Kill inputs. The SS741MG MAGNUM is protected against speaker shorts with a self resetting circuit and a high & low voltage shutdown feature. The unit also features jumpers for option selections, public address override and separate volume controls for the radio repeat and public address functions. Includes an attached noise canceling PA microphone and is backlit for easy night time readability. Ships complete with wire harness with positive locking connector, mic clip, mounting bracket, hardware, and instructions. Two isolated amplifiers in one box Wail, Yelp, Air Horn, Phaser, Manual, and Two-Tone Self-resetting circuit protection against speaker shorts Integrated public address microphone Park Kill input Auxiliary input Positive locking wiring harness included Replaceable jumpers for option selection Positive and negative switching for AUX and PKILL inputs High and Low voltage shutdown protection Truck mount amplifier Drives one or two 100 Watt speakers Control Head:1.5" Deep x 6.25" Wide x 2.75" High Amplifier Box:7.33" Deep x 7" Wide x 2.5" High Weight: 9 lbs. Output: 200 Watts (2 speakers) Voltage: 10-16 V DC Frequency: 675-1633 Hz Amp Draw: 16 Amps