Powerful battery for long operating time: The built-in 2000 mAh lithium battery fully charges in approximately 3.5 hours, providing up to 5 hours of continuous spray time and up to 7 hours of intermittent spray time. Fine mist output: This battery-powered humidifier features nano-atomization technology that breaks water into ultra-fine mist particles for better dispersion and improved moisture delivery to dry air and dry nasal passages. Energy-efficient design: The rechargeable humidifier includes an integrated auto-shutoff sensor that turns the device off when water runs out, allowing safe operation during rest or sleep. Replace filters regularly: We recommend replacing the filter every 23 months depending on usage and water quality. In areas with hard water, more frequent replacements may be needed. Specifications: Color: White Size: 17.8 x 9.7 x 9.7 cm Important: 1. Soak the wick filter in clean water for 35 minutes before first use. 2. Use clean tap water only. Do not use purified or distilled water, as it may cause mist blockage. 3. Charge the humidifier for at least 1 hour before initial use. 4. Use a power adapter with output below 5V. NOTE: Do not add essential oils. Use tap water only. Package includes: 1 x Ultrasonic Air Moisturizer