Compact and lightweight, this personal humidifier offers portability that is perfect for travel use. Small enough to easily fit in your luggage or carry on. Two different sized bottle adapters and a 100~~240V AC adapter allows universal usage. All you need to obtain at destination is a bottle of water. Also ideal for use at work, in nursery or for anyone who desires its convenience and portability. Ultrasonic technology offers cool mist and quiet operation. Highly recommended by Just a Sec (posted by Violet Newsstead, Jan 5, 2009). Read review Features and Functions · Cool mist (ultrasonic technology) · 120cc per hour humidity output · Adjustable mist · Uses water bottle instead of water tank · Water refill indicator · Quiet operation · Low power consumption · UL listed AC adapter · Patent pending INSTRUCTION MANUAL Specifications | Input voltage | 100-240V ~ 50/60Hz | Power consumption | 15W | Noise level @ 1ft (highest/lowest) | 32.22/30.62 | Unit dimension (L x W x H) | 4 x 2.5 x 3 in. | Unit weight (with / without adapter) | 0.9 / 0.5 lbs | Package dimension (L x W x H) | 7.25 x 6.25 x 4 in. | Package weight | 1.4 lbs | |