Despite its small size, the Pebble Diffuser packs a lot of power. This ultrasonic diffuser delivers several useful features, including a five-hour continuous runtime, ten-hour intermittent runtime, and multiple light settings. Perfect for giving out as gifts to clients and close friends or for each room of your house! The size of the Pebble Diffuser makes it a subtle addition to your home décor, while still allowing you to enjoy diffusing all your favorite essential oils. With its compact size and easy-to-use features, the doTERRA Pebble Diffuser is an excellent choice for anyone looking to incorporate the benefits of aromatherapy into their daily routine. Water capacity: 100 mL/3.5 fl. oz. Suggested room size: Up to 270 sq. ft./25 sq. m. Continuous operation: Up to 5 hrs. Intermittent operation (5 mins. on/5 mins. off): Up to 10 hrs. Timer: 2 hrs./5 hrs./10 hrs. Cyan, White, purple, warm white, and blue light options Automatic safety shutoff Power: DC5V 5W Material: PP, ABS Only used a few times, ships without original packaging.