PROTEOR SYNSYS Notice D'utilisation page 34

D. Swing phase initiation
The knee is in safe mode in stance phase; it is freed before toeing off.
If the knee is not released quickly enough, reduce this value
-
+ If the knee is released too quickly, increase this value.
Possible malfunction on soft ground, snow, sand...
Setting range: +/-5% around the value set by the certified prosthetist.
EN - 9