Timer, anesthesia timer, surgery timer, and general clock timer are used for both hour, minute, and second timing. They are clearly labeled and equipped with a timer controller, and can automatically turn on the battery in case of power outage, with a distance of 2 meters from the ground.

Working principle: Adopting the working principle of high-voltage electrostatic adsorption and dust removal. Electrostatic type adopts the working principle of high-voltage electrostatic adsorption and dust removal.

Activated carbon is a porous carbon containing substance with highly developed pore structure. The porous structure of activated carbon provides it with a large amount of surface area.