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 Cone Chrome Steel Push-On Lug Nut Cover w/ Flange Heavy Duty 18″ Steering Wheel Cover in Deluxe+ Sports Series Sitting Lady Hood Ornament Gear Shift Boot Covers in 30″ (L) Axis Top Chrome ABS Front Axle Hub Cap Cover Only Rain Cap for Muffler Stack