<p>Three Touch Control Keys Instruction:</p><p> Mode: Clock Switch 12/24H Format, Switch ℃/℉ . <br>UP: Min/Max Temperature and Humidity <br>Down: Alarm Clock Setting <p>Humidity Reference Value:</p><p> <br>DRY Humidity < 40% <br>COMFORT 40% < Humidity < 74% <br>WET Humidity > 75% <br>NOT SURE 40% < Humidity < 74% <p>Specifications:</p><p> <br>Material: ABS <br>Item Color: Silver <br>Display / Function: time, °C/°F temperature, humidity, 12/24 hour format <br>LCD Screen Size: 2.7 Inch <br>Power Supply: 2*AAA alkaline battery ( not included) <br>Measure Temp. Range: 0°C - 50°C/32°F - 122°F <br>Temp Accuracy: +/-1% <br>Measure Humidity Range: 20~95% <br>Humidity Accuracy: +/- 5% <br>Szie: 8.5*8.5*2.5cm/3.3*3.3*1 Inch <br>Net Weight: 0.11kg/3.9oz <p>Package:</p><p> 1*Temperature Humidity Clock <br>1*User Manual <br>1*Package Box