Kestrel Elite Weather Meter with Applied Ballistics and Bluetooth Link, Olive Drab Description Features: Employs the Applied Ballistics bullet library of custom drag models, an exact measurement of your bullets drag profile plus corrections for Aerodynamic Jump, Spin Drift, Coriolis, and Drop Scale Factoring to achieve accurate long-range shots Measure up to 15 environmental parameters at your fingertips Improved high resolution screen for any lighting (even sunlight) and easy on your eyes; Intuitive user-interface screen navigation Scratch and breakage-resistant window Includes LiNK connectivity powered by Bluetooth low energy provides wireless communication to mobile devices and computers Product Details: Brand: Kestrel Recommended Uses For Product: Residential, commercial, agricultural, and research applications Specific Uses For Product: Residential, commercial, agricultural, and research applications Power Source: Battery Powered Special Feature: Weather Resistant Connectivity Technology: Bluetooth Number of Batteries: 1 AA batteries required. (included) Style: Modern Color: Olive Drab Are Batteries Included: Yes Is Discontinued By Manufacturer ‏ : ‎ No Product Dimensions ‏ : ‎ 2.01 x 0.39 x 0.75 inches; 1.2 Ounces Item model number ‏ : ‎ OB-KEST-0857ALOLV Batteries ‏ : ‎ 1 AA batteries required. (included) Date First Available ‏ : ‎ October 28, 2015 Manufacturer ‏ : ‎ NK Kestrel Country of Origin ‏ : ‎ USA Best Sellers Rank: #75,072 in Sports & Outdoors (See Top 100 in Sports & Outdoors) #5 in Weather Monitors #5 in Weather Monitors