Function: Ambient temperature and relative humidity can be measured in real time. The relative humidity refers to the proportion of the absolute water vapor content and the content of saturated water vapor in the gas in the same gas volume at the same temperature and pressure.Large display: Large LCD display, convenient button, you can view the minimum and maximum values with one push of a button.Fast measurement: Combination of two measurement functions for temperature and humidity for more comfort. The product uses a highly sensitive sensor for faster measurements with an adoption of 0.5 seconds.Alarm function: It is convenient for inspectors to quickly recognize unusual conditions.Data Storage: Stores up to 100 pieces of data, useful for viewing and organizing data.Model: SW-572Temperature measuring range: -20.0 C ~ 60.0 C (-4 F ~ 140 F)Temperature accuracy: +/- 0.3 C ( +/- 0.5 F)Temperature. Resolution: 0.1 C (0.1 F)Humidity measuring range: 0% RH ~ 100% RHHumidity accuracy: +/- 3% RHMoisture resolution: 0.1% RHResponse time: more than (depending on heat exchange)Humidity time: 8s (humidity is 63%, 25 C, 1m / s air flow)Sampling rate: 0.5 secondsTemperature. Alarm max / min: YesHumen Max / min Warning: YesTemp. Max. / Min: YesHumen Max. Size / min. Size: yesStorage: 100Data retention: YesThe backlight switches off automatically: 10 minutesAutomatic / manual shutdown: 30 minutesPower supply: 3 x 1.5 V AAA batteries (not included)Working environment: -20.0 C ~ 60.0 C, 0% ~ 100% RHStorage environment: -10.0 C ~ 60.0 C, relative humidity 20% ~ 70%Colour: blackMaterial: plastic + electronic componentsSize: 188 x 64 x 27mmPackage Contents:1 x digi temperature detector1 x Chinese and English manualOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.