Lutron SP-82AL 3 in 1 Mini Barometer, Anemometer, Altitute Meter

\n3 in 1, + Barometer, Anemometer\nALTITUDE METER\nModel : SP-82AL\n* Multi-functions, mini pocket size, 3 in 1 :\n1. Altitude meter, 2. Barometer 3. Anemometer\n* Precision baro sensor for the atmosphere value and altitude measurement.\n* Low-friction ball bearing mounted wheel design\n* Altitude : -2000 to 9000 m, meter/feet.\n* Air velocity : 0.4 to 20.0 m/s.\n* Air velocity unit : m/s, ft/min., kmh, mph, knot.\n* Barometer unit : hPa, mmHg, inHg.\n* Size : 120 mm x 45 mm x 20 mm.\n* Battery and carrying case are included.\n