Kestrel 2500 Weather Meter

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 40 m/ s ( 0.1 resolution, 3% accuracy) 59 to 7, 877 ft/ min ( 1 resolution, 3% accuracy) 1.0 to 144 km/ h ( 0.1 resolution, 3% accuracy) 0.8 to 89 mph ( 1 resolution, 3% accuracy) 0.6 to 78 kt ( 0.1 resolution, 3% accuracy) 0 to 12 Beaufort ( 0.1 resolution, 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)