Km023 is a classic manual revolving door produced by kbb in 3 wing and 4 wing models. Although the km023 has not been equipped with electronic control and sensors, it can be updated to the standard ka023 automatic revolving door model upon users demand. Function: Operation features Remote control function All down-lights can be remote controlled. Airproof brush system: Based on static balance theory, km023 applies airproof and dustproof brush.