Touchless door release buttons have become a standard feature in modern access control systems, offering users a convenient and hygienic way to exit secured areas. As adoption continues to grow, many assume that all touchless buttons operate in essentially the same way. After all, if a simple wave of the hand opens the door, does the technology behind it really matter?

Hong Kong doesn’t really have a “typical” residential building — it has thousands of them, stacked thirty, forty, sixty storeys into the sky, each one packing more people through a single lobby than most countries would put through an office tower. That’s not a design choice anyone made lightly; it’s a direct answer to one of the highest population densities on earth, with some districts regularly exceeding 40,000–50,000 people per square kilometre. A single public housing estate can easily...

In today's commercial and institutional environments, access control is no longer defined solely by who can enter a facility—it is equally important to ensure occupants can exit safely, conveniently, and reliably. Traditional push-to-exit buttons have long been a standard component of access control systems. However, building owners, facility managers, and security integrators are increasingly seeking solutions that offer enhanced user convenience, simplified maintenance, and a more modern...