Top-Air's classic column design uses a brushed aluminum alloy surface process. Top-air is difffferent with

other models design which coverage reach around 2000m3. The device can be equipped with the latest

version of the operating system and super background, which can quickly and easily know the working

status and situation of the device. At the same time, it supports the use of lithium batteries and low-power

versions, and can be used in many places that are not cnvenient for power connection.