Extech Instruments Heat Stress Meter with Limited Nist

Larger Capacity: With 5Litres water tank which can emit a cool water vapor into the air for full night.
Perfect Design: Matte black body design makes it to be a perfect decoration in any places.
Sleep Mode: You can choose sleep mode if you long press the power button. It will be middle mist output and all indicator light will turn off. Short press the power button, you can choose the mist output: Low-Middle-High. Working time: 14 -17 hours.