AZ8910 Wind Speed ,Weather ,Air Pressure, Height 4-in-1 Anemometer Product Description& 65306;           model     AZ8909     AZ8910           Wind speed range      0.5~44.7M/H, 60~3937FT/M, 0.4~38.8KNT,  1.1~20.0M/S, 0.7~72.0KMH, 1~8BF           Wind speed accuracy     +/- (3% of reading +0.2 m/s)           Air temp. range     -15~50.0 C           Air temp. resolution     0.1 C/ F           Air temp. accuracy     +/-1 C           Air RH% range Air RH% resolution Air RH% accuracy     5%RH~95%RH  0.1%RH  +/-3%RH(at 25C, 1 0~90%RH, others +/-5%RH)           Pressure range Pressure resolution Pressure accuracy      400~1100mbar  1(400~1100mb ar/hpa), 0.1(11.8~32.5inHg) +/-3hpa (at-10~60 C )           Altitude range &res.     N/A     -274~2743M(1M), -900~9000Ft(3 Ft)           Altitude/Pressure update     N/A     60 seconds           Wind speed response time     averaging every 2 seconds           Temp. response time Air RH% response time Pressure response time     60 seconds (typical) 60 seconds (typical) 15 minute (typical)           LCD update     every second           Windchill display Dew point temp.display Heat index display     YES YES YES           Altitude display     N/A     YES           LCD size     16(H)x28(W)mm           Operating temp.     -15~50 C           Operating RH%     Humidity < 80%           Storage temp.     -20~50 C           Storage RH%     Humidity < 90%           Dimension(mm)     150x55x25 (90 folded);235x55x25 (180 full opened)           Weight     ~90g           Battery     CR2032 x 1pc           Standard Package     Meter/Manual/Strap/Paper boX               H