The Kestrel 2500 Pocket Weather Meter measures wind and temperature with total accuracy and has the added benefits of an air pressure sensor that provides altitude and barometric information. Kestrel 2500 technology enables you to follow changes in air pressure that help predict impending changes in the weather. Factor in the 2500’s digital altimeter and you have most of the weather information you need for outdoor activities ranging from model airplane flight to rifle practice. – As with all our Kestrels the 2500’s sensitive and user-replaceable impeller technology provides accurate wind speed info. Additionally an external temperature sensor and waterproof casing allow you to gauge the temperature of water (it even floats) and snow as well as the open air. A hard slide-on case lanyard and battery are included. – The Kestrel 2500 was originated as a basic model for long range shooters at an affordable price and someone who didn’t need the ballistic features build in like the 5700 Elite. – For those using it at night the Olive Drab NV version of the Kestrel 2500 features a night-vision preserving backlight. Backlight incorporates optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. (Note: This backlight appears soft greyish pink not red and is still in the visible spectrum so is not compatible with night-vision equipment.) – The Kestrel Meter 2500 Meter Measures/Features – Current Wind Speed – Maximum Wind Gust – Average 3 Second Wind Speed – Air Water & Snow Temperature – Wind Chill – Barometric Pressure – Altitude – Real-time clock – Protective cover with sure-grip over molding – Data hold function – Large easy-to-read display with backlight – Waterproof and floats – Innovative design for stability and accuracy in abrupt condition changes – Patented user-replaceable impeller – Quick response external thermistor – High precision pressure sensor – Reliable portable and easy to use – All instruments and accessories are completely assembled in the USA – Kestrel 2500 Includes – A slip-on protective cover – Neck lanyard – CR2032 coin cell battery (Average life 300 hours)