Feature 1、This wireless digital hygrothermograph suitable for monitoring indoor temperature in two metrics, °F or °C. 2、Made of quality material, sturdy, lightweight and resistant to high and low temperature, durable for long time use. 3、Large LCD display provides enhanced visibility and at-a-glance readings, convenient to use. 4、Teperature measuring range is -10-70℃, humidity measuring range is 10%~99%RH3. 5、It applies torefrigerated cabinets, display counters and other needs of temperature measurement and display of various equipment. Condition: Item Type: Hygrothermograph Temperature Measurement Range: -10-70 ° C (14-158 °F) Humidity Measurement Range: 10%~99% RH3 Temperature Accuracy: ±1 °C Humidity Accuracy: ± 5% Measurement Time: 5 s Power: 1 x 3V CR2032 button battery (Not included) Size: Approx.88x48x14mm / 3.5x1.9x0.6in Instruction: 1. °C / °F: Fahrenheit and Celsius temperature switch button. 2. SET: Continue to press the “Set” button to set the temperature and humidity HI/LO alarm data. 3. CLR: In the normal display state, press the “CLR” button to clear the maximum and minimum data. In the setting state, press "CLR" to adjust the data. 4. MODE: In the normal display state, press [Mode] to turn on/off the temperature and humidity automatic switch display function. In the setting state, press “MODE” to turn the alarm function on/off. 5. Switch: On/Off (the back of the thermometer). Package List 1 x Instruction Manual 1 x Hygrothermograph Note 1. Keep the screen clean and avoid dust, oil and so on. 2. Do not drop the product on the ground. 3. This product is not waterproof, please stay away from water. 4. When the display becomes dark, please replace the battery in time. 5. The LCD screen is a capacitive touch screen. Use your fingertips instead of the nail touch button. Troubleshooting: When the button is not working, clean the LCD with alcohol cleaning fabric; then restart the thermometer.