Feature●LCD Display Shows Current Ambient Temperature and Humidity Readings●Measurement Range of -35C to 80C and 0 to 100% RH with 0.5C (temp) and 3.0% RH (Humidity) Accuracy●10 Second to 12 Hour Sampling Rate●1 Year Battery Life and LED Operational and Alarm Indicators●Includes 1/2 AA 3.6 Volt Lithium Battery. PC-Compatible Software is Available As A Free Download.Description Stand-alone data logger measures and stores over 16,000 temperature and humidity readings. Set up and view downloaded data by plugging the logger into a PC’s USB port. Cycle between the current temperature and humidity, along with maximum and minimum stored values for temperature and humidity on a high contrast LCD.