Specifications: The one with built-in battery has large capacity battery, which has long standby time. It is designed with LED night light, which helps you to see in the dark. With lower than 40dB operation noise, it causes no disturbance for your sleep and work. The humidifier has intelligent dual spray modes, including continuous spray mode and intermittent spray mode. It provides power-off protection to prevent dry burning, which is safer to use. It is suitable for home, car and office use. Item Name: Humidifier Material: ABS, PC, Electronic Components Working Voltage: DC 5V Power: 1.8W Battery Capacity (with Battery Type): 800mAh (Included) Water Tank Capacity: 280ml Spray Volume: 40-50ml/h Features: with LED, Power-off protection, Lower Noise Size: 17.1cm x 6.8cm x 6.8cm/6.73" x 2.68" x 2.68" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Humidifier 1 x USB Cable