The product measures time set in minutes, and after it expires enables a sound signal and switches off the oven automatically. The timer also protects against uncontrolled oven switch-on.
Safety first. If the flame goes out uncontrollably the safety valve cuts off gas supply to the burners and prevents gas leakages.
The gas supply is cut off automatically if the flame is extinguised uncontrollably as a result of a draught or pan overflowing for example.