Wacool; Digital Thermometer. Thermometer temperature range: 10-48.8degree celcius. Accuracy: +/-1degree celcius. Additional plastic fixture. Unique spre battrey box. Reset functional key. Can display temperature in both celcius and fahrenheit. IN and OUT switches. IN will display the temperature of the place where the unit is placed. and OUT will display the temperature where the sensor is placed. MAX and MIN switches will show maximum and minimum temperature. hold the key can clear the maximum and minimum memory.