Hi Yuki, it means a few things:
1) The bindings are certified to DIN standards for release.
2) Due to the lateral-heel release, they tend to be better for the knees than alpine bindings (which are not designed to protect your knees as we explained in this article).
3) Because the ST Rotation toe is on a rotating plate, the condition of boot fittings has been essentially removed as a release-variable as compared to standard tech toes.
4) With the "gapless" heel on a spring, the release values stay relativel...