Does this charger sense when it's connected?

i.e. If left plugged in to a power outlet when not connected to a device will it still draw current?

I'll be using it to charge a Touchbar MBP 15". With my previous MBP I would charge it from my Thunderbolt monitor, which only supplied current when the MBP was connected. Since a MagSafe to USB-C adapter is not available I will have to use this charger instead but will need to leave it connected to the wall socket behind my desk and I don't want it to be wasting current through the transformer all day while I'm out.

Thanks in advance.

87W USB-C Power Adapter

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