1. This is a diffuser, no need for any cotton buds, you can add non-corrosive essential oils to disperse the aroma. 2. Please make sure you use a 5V1A adapter for power supply, otherwise the circuit may be damaged. 3. Can add essential oils to soothe body and mind, to say goodbye to insomnia into the water tank drops 2-3 drops of essential oil to the surface, soothe body and mind 4. Soft mist humidification flame simulation aromatherapy machine flame simulation | Low noise essential oils can be added humidification spray 5. Ultrasonic technology, i.e. open and used Product name: 5V flame humidification aromatherapy machine Product number: XHC-XF06 Water tank capacity: 300ML Spray volume: 20-30ML/H or more Working voltage: DC5V Working current: 1A Working Power: 5W Model Number: USB Humidifier Type: Quiet Air Humidifier Application: Humidifying and Humidifying Type: Night Light Humidifiers Speed: 4-Mist Modes Function 1: Desktop USB Diffuser Function 2: Home Humidifier Function 3: Office Humidifier Application: Car/Outdoor Camping/Living Room Color: White/Black Material: ABS+PP Package Contents: 1 * Humidifier Diffuser 1 * USB Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item the photo will be slightly different than the real one. The measurement error is +/- 1-3cm. Shipping Time: We can ship all products within 5~8 business days