Tips for Best Use-①Please use a standard & certificated power adapter with voltage DC5V/1A. ②Please use clean tap water. Do not use essential oils, perfume, distilled water, filtered water which will cause the cotton swab to clog and the Humidifier to be unusable. ③Please make sure the cotton core has soaked a few minutes before you turning it on. ④After turn on the humidifier, please wait for one minute for the mist to come out. ⑤If there is any problem with the product, please do feel free to contact us. PORTABLE MINI HUMIDIFIER - Portable and small design (3.74*5.07inch) is very easy take with you anywhere and super perfect for travel, bedroom, office, which is effectively moisturize dry skin and help you reduce skin peeling. TWO MIST MODES - This mini humidifier has two modes. When you press the button first time, it will continuously spray for 6 hours. When you press again and it will intermittently spray (stop 2 seconds) for 12 hours. 500ml large capacity produces longer mist.