Description: Ultrasonic humidifier is constructed with the finest durable ABS materials that provides long-lasting usability.Choice your favorite aroma essential oil and enjoy a fresh scent throughout your house or office as a arom diffuser. This Ultrasonic humidifier Less than 30 dB quiet atmosphere can create a quieter sleeping environment.The humidifier will automatically shut off when water runs out.Sleep safe. This Ultrasonic humidifier with light design, a warm night light helps you have a sweet dream. USB Powered or Battery-operated 2 styles Power Source for your choices. Smart LED screen displays real-time power and charging signs, much more convenient. Double spray or single alternate spray, enjoy the custom humidity environment & Nano atomizing technology. Specification: Material: ABS PP Voltage: 4.2V Working current: 600-1200MA Water tank capacity: 650ML Continuous spray time: 3-6H Size: Approx. 100x100x143mm / 3.9x3.9x5.6inch Package Includes: 1 Piece Ultrasonic Humidifier 1 Piece USB Cable(for USB Powered) 1 Piece Battery(for Battery-operated) Note: 1.Please allow slightly difference due to manual measurement . 2.Colour may be slightly different since different monitor.Thanks.