What are the features of the telescopic handle push-button on Xiaomi Aluminum Frame Luggage?

The concave design of the telescopic handle push-button on the Xiaomi Aluminum Frame Luggage is intended to enhance ergonomic usability by conforming to the contours of the fingertip. This design ensures comfortable usage.
It is recommended that you operate the buttons with your thumbs and keep the direction of the thumb fingers in line with the lateral direction of the telescopic handle so that there is no sharpness on the edges.