★ Double tube design, 360 ° multi-directional sterilization, anti-collision and drop protection tube★ After-sales products: If you have any questions about the products, you can contact us at any time and we will answer you as soon as possible.★ Using breakthrough 3D air three-dimensional circulation technology, 360 ° air circulation indoor large space circulation purification purification upgrades, expanding the ultraviolet exposure area, more thorough sterilization