Dont worry, it won't explode.
MAke sure you turn the power off before you start.
One point. You have two wires to connect, red and black?? ) and the old switch has two terminals.
Your new switch will have three terminals. Don't worry.
Put one wire (the red one into the terminal marked C). The other wire can go into either of the other terminals (L1 or L2)
If there is an earth wire, there should be an earth terminal on the back box. That's it
MAke sure you turn the power off before you start.
One point. You have two wires to connect, red and black?? ) and the old switch has two terminals.
Your new switch will have three terminals. Don't worry.
Put one wire (the red one into the terminal marked C). The other wire can go into either of the other terminals (L1 or L2)
If there is an earth wire, there should be an earth terminal on the back box. That's it