PLUGC4F 4-in-1 cigarette plug

Hello I purchased this item because I have multiple equipments to plug on a single cigarette lighter socket (like a multi socket adaptator).

But now I’m doubting if I chose right. It says :
“This model is designed to convert your car’s existing cigarette lighter socket into: 1 x cigarette lighter socket + 3 x 12V DC socket.”

What is the difference between the cigarette lighter socket and the 3 other “12V DC sockets” ? Is it safe to use them as a cigarette lighter socket similar to the other one ?

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