Check the listing for details. Nikon Ballistic Spot On Windmeter Wind Speed Meter 16144. Color: Black and Red, Condition: New. Listed at 13.99 USD. The Nikon Spot On Wind Meter plugs directly into the headphone port of your cell phone to provide an accurate reading of wind speed and direction. These Shooting Accessories by Nikon Sport Optics sync the data directly into the Spot On Ballistic Match Technology Application to deliver a precise aiming point on your reticle to compensate for distance as well as wind drift displayed in either clicks, inches, or MOA. The Nikon Spot On BDC Wind Meter measures wind speed, wind direction, and wind proximity to determine so you can shoot confidently even in the wind. Don't leave home without the Nikon Spot On Ballistic Wind Tool in your gear bag!Specifications for Nikon Spot On Ballistic Wind Meter:Color:Black/YellowHandle Color:YellowFor use with Nikon's Spot On appPackage Contents:Nikon Spot On Ballistic Wind Meter, NI-SY-16144