Kestrel 2500

The Kestrel 2500 Pocket Weather Meter has all the great features of the Kestrel 2000 with the addition of a pressure sensor. A three-hour pressure trend indicator helps you to predict fish and wildlife activity and know when the weather's going to turn nasty. Add in the easy-to-use altimeter and you have the perfect instrument for any outdoor activity!
The night vision version of this model (Kestrel 2500 NV) has night-vision preserving backlight to help maintain the user's natural night vision.
Features:
Barometric Pressure
Continuously updating three-hour barometric pressure trend indicator: rising rapidly, rising, steady, falling, falling rapidly
Altitude
Wind Chill
Air, Water, & Snow Temperature
Current & Average Wind Speed
Maximum Wind Gust
One-button clear and restart of Max Wind Gust and Average
Wind measurement
Waterproof & Floats
Real-time hours:minutes clock
Hold Function
Aviation green electroluminescent backlight (Kestrel 2500) Night-vision preserving electroluminescent backlight (Kestrel 2500 NV). Backlight incorporates optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. Please note: This backlight appears soft greyish pink, not "red," and is still in the visible spectrum, so is not compatible with night-vision equipment.
Auto shutdown after 45 minutes of no key presses
User-replaceable Impeller
External Temerature Sensor
Slip-On Protective Cover
Neck Lanyard
Five-year warranty from the manufacturer
Specifications:
Wind Speed (sample every 1 second)
  0.4 to 60 m/s (0.1 resolution, 3% accuracy)
  59 to 11,948 ft/min (1 res, 3% accuracy)
  1 to 218 km/h (0.1 resolution, 3% accuracy)
  0.8 to 135 mph (1 resolution, 3% accuracy)
  0.6 to 118.3 kt (0.1 resolution, 3% accuracy)
  0 to 12 Beaufort (0.1 res, 3% accuracy)
Temperature (sample every 1 second)
  -20.0 to 158.0 °F (0.1 res, 1.8 °F accuracy)
  -29.0 to 70.0 °C ( 0.1 res, 1.0 °C accuracy)
Barometric Pressure (sample every 1 second)
  8.86 to 32.48 inHg
  (0.01 resolution, 0.05 inHg accuracy)
  300 to 1100 hPa / mb
  (0.1 resolution, 1.5 hPa / mb accuracy)
  PSI (0.1 resolution)
Altitude ( sample every 1 second)
  -6000 to 30000 ft (1 res, 50 ft accuracy)
  -2000 to 9000 m (1 res, 15 m accuracy)
Wind Chill (sample every 1 second)
  -49.0 to 257.0 °F (0.1 res, 1.8 °F accuracy)
  -45.0 to 125.0 °C (0.1 res, 1.0 °C accuracy)
Power requirements:
  1 CR2032 Coin Cell (included)
Battery life: ±300 hours, depending on backlight use
Dimensions:
Unit: 4.8" x 1.7" x 0.7"
(122mm x 42mm x 18mm)
Case: 4.8" x 1.9" x 1.1"
(122mm x 48mm x 28mm)