Features • Exceptional accuracy in a small package • Balanced instant wind speed in upper line • Maximum windspeed in lower display (reset when turned off) • LCD backlight with double-press of button • Stainless steel back • Waterproof • Replaceable battery • Designed in Switzerland • Reads in MPH, KPH, Knots, feet/second and m/sec Specifications ACCURACY: +/- 3% when aligned within 30° of the wind's axis WINDSPEED: Up to 94 MPH (170 KPH / 60 m/s / 115 KNTS) MEASURES: 1.2" x 3.28" x .38" POWER: Lithium Battery (included) WEIGHS: 2 ounces OPERATING TEMP: 14 - 122 F