Features: Display temperature, relative humidity and dew point. It is easy to operate and is ideal for field, laboratory, workshop, warehouse and home applications. LED alarm, Humidity alarm function can be turned on or off. Humidity alarm limit can be set according to your actual needs. The temperature - humidity sensor can be installed on the left side of the instrument or extended to other positions for measurement. The meter can be mounted on a wall or placed on a flat surface. The sensor probe is approximately 1.64 feet (50 cm). Data storage for maximum or minimum temperature and humidity values. It can exchange degrees Fahrenheit or Celsius according to your application preference. Large LCD display.it's easier to use LCD screen and get quick readouts Specification: Temperature measurement range: - 10- 60 or 14- 140 Temperature resolution: 0.1 or 0.2 Temperature accuracy:1.0 or 1.8 Relative humidity measurement range: 20 percent RH- 95 percent RH Humidity resolution: 1 percent Humidity accuracy:5 percent RH,25 percent to 85 percent between RH and 0to 50 Dew point measuring range: -29-59 or -20.2-138.2 Dew point resolution: 0.1 or 0.2 Precision dew point:2 20 or 3.6 68 Sampling rate: about once every 3 seconds Set humidity alarm limit range: 20 percent - 95 percent Working temperature: 0to and 50 Sensors: - 10- and 60 Storage temperature: - 20- and 50 Battery: 2 x 1.5v AAA(battery not included) Size: 115 x 114 x 66mm or 4.5 x 4.5 x 2.6in Sensor probe : Approx. 1.64 feet (50 cm) Package list: 1 x Thermo- Hygrometer(battery not included)1 x Suck Disc Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering..