The new and improved Skywatch Atmos hand-held weather station is ideal for sailors, windsurfers, kitesurfers or fans of aviation. The device collects data and immediately displays it on the built-in display. The Skywatch ATMOS measures wind strength and temperature. In addition, the application calculates the perceived temperature. If you are a water sports lover this is the ideal anemometer to go for. It is compact enough to fit in your pocket and will help you to choose the right equipment for the conditions on the day.   Features Backlight Waterproof and floating device Average: Period time of 3s to 24h Aluminium bottom plate for tripod attachment Low battery indicator Swiss official calibration Protective cap for propeller Pouch included Warranty: 1 year       General  Operating temperature: -20 to +70°CPower: 2 AA batteriesDimensions: ø65mm x 155mmWeight: 235 grams   Wind Units: mph, km/h, m/s, fps, knots and BeaufortResolution: 0.1 to 99.9, then 1 unitPrecision: ± 3% (10 to 150 km/h)Measuring range: From 2 to 150 km/hModes: minimum, average and maximum Temperature Units: °C or °FResolution: 0.1 unitPrecision: ±0.4°C (at 25°C) / ±1°F (at 77°F)Measuring range: From -20 to +70°C / From -4 to +158°FModes: instant, minimum, average and maximum and wind chill factor