Kestrel 2500 Pocket Weather Meter Accurate, rugged handheld wind /airflow meter with large, replaceable impeller, responsive temperature sensor and digital pressure altimeter; optional night-vision-preserving backlight Measures and displays barometric pressure & 3-hour pressure trend, altitude, wind chill, air/water/snow temperature, current/average/maximum wind speeds on large, clear LCD Waterproof (IP-67), floats, drop-tested to military standards (MIL-STD-810G), patented Includes slip-on protective cover, neck lanyard, CR2032 coin cell battery and 5-year warranty Used in hunting, fishing, animal behavior prediction, varmint hunting, military operations, law enforcement, backpacking, camping, climbing, mountaineering, research and more