Features Large-character LCD display for indoor temperature, indoor humidity 12-hour or 24-hour time setting Temperature unit can be changed between Celsius and Fahrenheit Records maximum/minimum indoor and outdoor temperatures Programmable alarms for outdoor high/low temperatures Alarm clock function Calendar display General Specs Brand & Model HTC-1 Type Clock temperature & humidity meter Temperature Range Ranges from -10 to 70 degrees Celsius (14-122 degrees Fahrenheit) Accuracy ±1 degree Celsius Resolution 0.1 degree Celsius / 0.1 degree Fahrenheit Humidity Range 10%~99%RH Humidity Accuracy ±5%RH Resolution 1%RH Power Supply 1.5v battery Package Details Weight: 141.24 g Size: 16.5*12.5*2.8 cm