Use the product by putting 2/3 of water and 1/3 of liquid soap into the liquid reservoir, leaving a 1 cm space in the reservoir for fluidity speed. The product works at two levels. The first level gives 0.6 g of foam, the second level gives 1 g of foam. For the second level, press the button to operate. Press and hold for 4 seconds. It is suitable for the use of all kinds of liquid and foam soap. Keep the battery chamber away from water. With its automaticity, stylish design and smiling emoji sensor, it will make your child love the habit of washing hands and provide a hygienic environment.