Built-in gas hob that comes with the safety flame device will have the gas supply cut off if the flame on the burner head is extinguished by a strong wind.
Tempered glass is a safety glass which when broken, the glass becomes small fragments or oval shaped pebbles instead of sharp pointed pieces when broken like normal glass.
By default, all Electrolux gas hob can use the normal LPG gas. If the customer is using natural gas, then he should inform the Electrolux service to change the gas nozzle on the hob to suit for natural gas usage. If the gas nozzle is not changed, then the flame from the burners will be small.
For more information on things to consider before buying a stove, check out Electrolux Stoves & Cookers Buying Guide.