changlinjiaju DN - 820 USB Oil Diffuser Ultrasonic HumidifierWhy do you need this small oil diffuser? This product adopts the most advanced ultrasonic atomization technology in the world. It is not only energy saving, but also environmentally friendly. It humidifies the air and brings you the pure and fresh air. The small and exquisite outlook enables you to enjoy the moist air anywhere and anytime. Main Features: - Unique portable design: palm-sized and large power design, it holds 80ml water and lasts about 4 - 8 hours. This aromatherapy diffuser comes with a 5V USB charging cable, so you can connect it to AC adapter, computer, power bank, or in the car - Multifunction: as a decorative piece, suitable for various environment. Humidifier for baby, for bedroom, office, yoga room, hotel, etc. Perfect gift for families and friends - Safe operation: it will automatically shut off when there is little water or no water inside to keep safe if you are out or in sleep. No need to worry about burning up, creating a calming, relaxing and security environment - A natural and graceful lifestyle: humidify the air of your room and prevents damage from second hand smoke and allergens - Ultra quiet design: ultrasonic diffusing technology produces vibrations at a low frequency, super quiet and without any noise when working - One button and light indicator design: one key to operate it, easy operation. The blue light indicator shows that it works normally, reassuring to use it Specifications: - Voltage: DC 5V, 1A - Power: 3.5W - Spray volume: 20ml/h - Water tank capacity: 80ml - Power supply: USB cable - Cable length: 1.3m   Plug Type: USB 0.2610 Package weight: 0.31 kg Product Size(L x W x H): 12.80 x 11.20 x 8.50 cm / 5.04 x 4.41 x 3.35 inches Package Size(L x W x H): 12.20 x 12.20 x 9.60 cm / 4.8 x 4.8 x 3.78 inches Package Contents: 1 x Humidifier, 1 x USB Cable, 1 x English User Manual