Be careful 1. This is a diffuser, no need for cotton swabs, you can add non-corrosive essential oils to diffuse the aroma. 2. Please make sure to use a 5V2A adapter for power supply, otherwise the circuit may be damaged. 3. Please make sure the level of is below the MAX line, please do not let the enter the ventilation duct, otherwise it may damage the circuit. 4. It is recommended to add essential oils. Please do not add perfume and cologne. Parameter Power supply: plug in USB cable (please use 5V2A for power supply) Tank capacity: 180ml Atomization amount: 15-20ml/h Usage time: 9-12 hours Color: White Material: ABS+PP+ electronic components Package Contents: 1 x Aroma Diffuser 1 x USB Cable 1 x Instructions in Chinese and English Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.