Thank you for viewing. I kept this at home without using it. I opened it once to check the contents. I am selling it because I no longer need it. Model number: EH-2801 Water tank capacity: 600ml Operating modes: There are three modes: POINT, PULSE, and NORMAL. Power: USB rechargeable (DC5V, 1A) Waterproof performance: IPX5 waterproof design, can be used in the bathroom. Portability: The main body is lightweight and compact, and the parts can be stored inside the tank, making it convenient to carry.