The Able 2/Sho-Me Undercover four function siren is not only extremely popular but offers one of the smallest most compact units on the market today. Let your presence be known with this undercover siren with Wail, Yelp, Phaser and Air Horn sounds. Designed for easy access, the control panel mounts discreetly under the dash. The powder-coated, L-shaped, aluminum bracket houses center-off switch for wail and yelp sounds and momentary rocker switch for phaser and air horn sounds. Its advanced design stays cooler to the touch and is engineered to withstand high-voltage spikes and reverse polarity.