Function Warns wildlife away from you, only animals can hear the alert Hardware Includes self-adhesive tape on bottom or mount with screws Unit & Package Sold by pair, carded for display Part No. Description 81990 Black 81991 Chrome Part No. & Image Selection Ultrasonic Animal Alert Part No.: -- Please Select -- 81990 81991 Combination of product variants is not available Updating... Related Products Standard Chrome Steel Push-On Lug Nut Cover for Bumper Premium Hi Viz DOT-C2 Conspicuity Tape in White 150′ Roll Spoke Chrome ABS Front Axle Hub Cap Cover Only Universal Front Notched Hubdometer Caps Heavy Duty 18″ Steering Wheel Cover in Deluxe Matte Natural Wood Mirror Mount Bracket Clamps