Offices with poor air circulation and dry atmospheres may well benefit from this humidifer, one of the many USB devices on the market. Fill with 40-150ml of tap water and it will give off a gentle mist using ultrasonic waves to keep you nicely moisturised. A blue LED light will be in operation when the device is workign and it comes with an automatic shut-off valve after 2 hours of use - $39
Related: Panda Humidifier I Breathe Easy with the Goodsphere
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