Ideal Tool for Windsurfing, Sailing, Fishing, Kite Flying and Mountaineering Specification *Measuring Items: Air Velocity & Air Temperature *Measuring range: ----Air Velocity: 0~45 m/s, 0~140 km/hr, 0~8800 Ft/min, 0~88Knots, 0~100 mph (Accuracy: ± 3%) ----Air Temperature: 0~45ºC, 32~113ºF (Accuracy± 2ºC) *Resolution: 0.2ºC, 0.1m/s Features *Unit of Velocity: m/s, Ft/min, Knots, Km/hr, Mph *C/F Selection *Backlight display *Max/Min reading (Air velocity) *Average/Current reading (Air velocity) *Data hold *Low battery indication *Manual/Auto power shut off (in 14minutes without any operation Package *Packing method: PP box + Gift box *Power supply: 9V battery *1pcs(not including) *Dimension: ----Main unit: 145*72*35mm ----Vane: 172*65*29mm *Weight: 275g