General description 500ml water tank for up to 16 hours of nebulization, perfect for reducing stress, promoting sleep, and enhancing work efficiency with various essential oils. Ideal for use in the bedroom, office, spa, yoga, and other occasions. Operates quietly due to ultrasonic technology, making it suitable for home use. Features a colorful lamp with 7 colors, each with 2 brightness levels, which can be used as a night light. Includes a built-in Bluetooth speaker for added functionality. Technical specifications Water tank capacity: 500ml Operating time: Up to 16 hours Other information Auto shut-off feature for water shortage protection to ensure safety. Bluetooth speaker connects via device name KCL-Bluetooth BT-Bluetooth. Note: Manual measurements may have a 1-3cm error margin, and color may vary due to lighting and display differences.