Smart sensor AR847 digital humidity temperature meter has -10°C ~ 50°C temperature measuring range, -20°C ~ 1000°C humidity measuring range, 5% RH ~ 98% RH accuracy of temperature, 1°C accuracy of humidity, auto / manual power off, low battery indication, data hold function, 0.1C temperature resolution, 0.1% RH humidity resolution, 1.5 times/sec sampling rate.