Temperature Humidity Meter TH804 Hygrometer Indoor Thermometer Temperature Range: 32.0 to 120.0 F / 0.0 to 50.0 C Humidity Range: 10% to 95% relative humidity - Resolution 1% Memory: min/max for temperature and humidity Dimensions: 4 1/4" x 2 1/4 " x 1/2" Battery: 1x 1.5 Volt AAA (included!)