Yeeco -0-50/32-122 LCD Thermometer Hygrometer Temperature Humidity Monitor Gauge Temp Tester with Time Alarm Clock Display Measuring range:Temperature: -0-50 (32-122)Humidity: 10% - 99% Accuracy: Temperature: +/- 1  (0-50 )Humidity: +/- 5% RH (60%) Resolution: Temperature 0.1  (0.2 )Humidity: 1% RH Dimensions: 100 x 101 x 22 (mm)/ (L x H x W); Display: 73 x 62(mm)/(L x W) Note: This temp gauge does not include a battery, you should prepare a AAA 1.5V