Figured I would include a picture as it helps with context. Although this is a Tesla EVSE any manufacturers EVSE is pretty much the same and all interchangeable as they all use the same format. The EVSE connects the house power to the Electric Vehicles built in charger in a safe and monitored way. It is essentially an extension cord with certain safety protocols and relays. The lower part with the lights is the EVSE, the upper part is just a place to coil the cord neatly. Its a piece of plastic. Notice it is plugged into a short 50 amp RV extension cord as the stove plug was in an opportune spot for this car.
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If one doesn't want to use the unit that came with the car (truck) then one can order an aftermarket unit for a few hundred bucks and hard wire it. This is our outside unit. This one is slower as out house only has 100 amp service and the electrician had to set it to a lower current. Still handy as we often use our garage for projects and can't always charge in there.
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Hope that helps.