These units are NEW in box with all accessories including mic and labels. Speaker not included. 

Description from SoundOff Signal: 

• Sound intensity and amplification to increase coverage on the scene

• Choose between button or knob control and 100 or 200-watt options

• 200-watt sirens feature dual-tone capability to deliver two siren tones at once to provide extreme “traffic moving” capability (2 speakers required for 200 watt sirens)

• Designed with extra large buttons and adequate spacing, which helps reduce accidental button activation

• Control panel switches operate up to 12 relay outputs (three 20 amp and nine 10 amp)

• Built-in protection against over/under voltage, short circuit and reverse polarity

• Hands-free feature allow siren tones to be cycled or canceled by pressing the horn button when the horn-ring circuit is connected