Hand washing bottle: also known as smart foam washing mobile phone, 4.5cm can induce bubbles. No contact to avoid cross infection. The inside of the handwashing hand adopts the infrared transmitting and receiving pipe design. When there is something in the range, the foam will be spit out, and the 1800mA large capacity aluminum battery will be built. Once it is used for charging for half a month, the top button can control the amount of foam and switch. At the same time, RGB three-color light is designed next to the key to display the gear and charging indication. The internal use of low-cost CPU OTP Jiuqi single chip microcomputer has great price advantage and high reliability.