Feature: 1. High Accuracy Sensor: With built in smart GXHTC3 humidity and temperature sensor, the temperature and humidity Meter can provide you with latest precise data every 2s. 2. Back Support: There is support at the back of the meter, which allows the meter to be placed at the desktop. Four vents give air wide access to internal sensors 3. Threshold Alarm: Thresholds for temperature and humidity can be set respectively. there will be a buzzer warning sound and the alarming light will flash when the temperature and humidity exceeds the threshold. 4. Temperature and Humidity Probe: The temperature and humidity probe will detect the Humidity and temperature, make sure you are always aware of your surrounding change and maintain a comfortable ambient. 5. Clear LED Display: Large screen digital display allows you to confirm the temperature and humidity keeping in an appropriate range anytime. Specification: Item Type: Temperature and Humidity Meter Material: ABS Color: Black Ambient Temperature: -20°C -80°C, ±1.0°C Relative Humidity: 0-100%RH, ±4%RH Operating Temperature: -20~ 80°C Operating Humidity: 45%-80%RH, altitude ≤2000m Display Mode: LED digital tube, single word 1.8 inch Sensor: GXHTC3 Sampling Rate: 2 times/second Over Range Display: "Hi" or "Lo" Operating environment: -20-80°C, maximum relative humidity of 80%, indoor altitude < 2000m Storage temperature: 0 ° C -60 ° C Power supply: DC 5V/1A. Package List: 1 x Temperature and Humidity Meter1 x Power Line2 x Hanging Hook1 x Locating Piece2 x Screw1 x Instruction Manual 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.