1. Wall-mounted design, lightweight and not occupying space, suitable for toilets, kitchens, public places and other environments. 4. Built-in battery, Type-C interface charging, combined with ultra-low power consumption design, can last a long time and eliminate the potential risk of DC power leakage. 2. Infrared induction bubble, no need to press, reach the bubble area, can quickly make bubbles. LED display, room temperature reading, on-off status, residual power, at a glance. 3. Dense foam, reasonable control of the proportion of foaming liquid and gas, resulting in delicate and soft foam. 5. storage capacity Rated capacity of 300ml, no need to change frequently. The back plate is separate design, which facilitates the installation of the body and the wall back plate. The separate design is easy to buckle and easy to install.