1.wind speed and wind temperature 2.0~45m/s,0~45C 3.MAX/MIN/ ... switch tester,gas detector.2. Specification Modal TL8901measuring itemswind speed/ wind temperaturemeasuring rangewind speed0~45m/s, 0~140km/h, 0~8800feet ... mile/hwind temperature0~45º C, 32~113º Faccuracywind speedaccuracy:± 3%wind temperatureaccuracy: ± 2º Cresolution0.2º C, 0.1m/swind speed unitm ...