One Button Control & Battery PoweredOne button controls for all functions, easy mist adjustment and color changing night light. Short press for 2 mist modes and long press for night light. Powered by USB or battery. It can be charged by computer, laptop, power bank, car charger, etc. Built-in rechargeable Li-ion battery has 1200mAh, 3 hours for full recharge. 2 Mist Modes & 7 Color Night LightThis 300ml mini humidifier has 2 mist modes: continuous spray for 4 hours and intermittent spray for 8 hours (stop for 3 seconds). Enhances ambient lighting to 7 colors whose colors can rotate or change in turn. It offers you maximum relaxation. Super Quiet & Auto Shut-offOur humidifier reduces noise to 35dB for quiet humidification without disturbing your study, work or sleep away from those annoying noises ; perfect for light sleepers, children and especially babies. And it will automatically shut off when there is no water, preventing damage and ensuring your safety. And the seal is strong, no longer afraid of pouring liquid to leak accidentally. AttentionsAdding tap water is better. Do not use essential oils, perfume in case of cotton clogging; Do not use mineral water, purified water, distilled water, or other treated bottled water if water droplets form. Make sure the cotton core has soaked for 3-5 minutes before first use.