1.wind speed and wind temperature 2.0~30m/s,-10~45C 3.MAX/MIN/AVG ... gauge, digital hygrothermograph, high voltage megohmmeter, ground resistance tester, electric leakage switch tester,gas detector.2. Specification ModalTL816measuring itemswind speed/ wind temperaturemeasuring ... /min, 0~55 nautical mile/h, 0~65land mile/hwind temperature-10~45º C, 14~113º Faccuracywind speedaccuracy:± 5%wind ...