Main Features: -This humidifier adds atomization technology to the lunar lamp technology to support humidification function while serving as night lamp. -This humidifier can be used with a little aromatherapy essential oil, but the replacement of sponge sticks in about a month will also reduce. -The service life of the humidifier faster, because the residual oil will clog the atomizer. So when customers add aromatherapy essential oil, please use it carefully. Specification voltage:5V; Power: 2W; Type A: 13cm Diameter with USB; B: 13cm Diameter with Battery; C: 15cm Diameter with USB; D: 15cm Diameter with Battery; Ball Diameter: 13/15cm; Water Tank Capacity: 1500ml; Material: PVC + Electronic Components; Light Color: White Light, Yellow Light, Warm White Light; Light Source Type: LED Light Source; Operation Method: Touch Control; Power Supply: USB; Charging time: about 2-3h; Gear Adjustment: 3gear; Noise: ＜36dB; Battery Information  Battery Type: Li-ion battery; Battery Capacity: 1200mAh; Dimension  Package Weight: 0.4kg ; Package Contents 1 x Humidifier, 1 x Bracket, 1 x USB Cable