This solved a problem for me to charge my Tesla Model S and still able to switch to use the dryer when I'm not charging. You can't do both at the same time but you don't have to keep unplugging and re-plugging.

I am in Canada and I was looking for a Dryer Splitter so that I could used it to keep my dryer plugged in and use the other 14-30
On my EV when I need to charge my vehicle.
Has you all know the new dryers all have on digital boards so every time you unplug and plugged back in it resets the digital board
And they aren't cheap to replace looked in my home town for a 14-30 splicer and couldn't find one tried a couple electrical shops
If they could make one but the answer was no couldn't be done so I googled it and sure enough I found it in amazon.
So I ordered one from PARKWORLD on Amazon Received my 14-30 Dryer SPLITTER a couple days ahead of time
So What I did I went to a appliance repair shop and got a 5 foot drier cord for 5 bucks bought a drier receptacle drilled a. 3/4"
Hole from laundry room to the garage wired the drier outlet box secure to the stud and now I have Level 2 charge for my EV
And when I need to charge my car I make sure my wife is not going to use the drier and I plug in my EV to charge and when I am finished charging I just unplugged from the car and at the box .
And it's been working great
So I like to Thank Companies like PARKWORLD to come up with this 14-30 nema Splitter it makes using your outlet much more
Versatile and you don't have to unplug the drier every time you want to charge your EV if you are using your drier power
And at same time you save hundreds by not have to hire electrician

I have a European washer and dryer that both use 240 Volts. An electrician designed a cable that split the American dryer receptacle into two European style plugs. The dryer broke down after many years and I replaced it with a similar American style dryer, but it required it's own American style receptacle. So I ordered your product that would split one dryer plug into two and now everything works perfectly. This would be perfect for when you have two dryers to hook up also. You just have to be aware of the wattage that both consume if you want to run them together.

I'm using this splitter, so I can share my dryer outlet with my EVSE cable that requires a NEMA 14-30, since I wasn't ready to call in an electrician and wire a new circuit to my garage.

Since I won't be running both at the same time, I figure this would save me some effort constantly plugging and unplugging, because I know the 14-30 dryer sockets aren't meant to be constantly plugged/unplugged.

It's super thick while still being reasonably flexible considering the gauge, and easy enough to route between the dryer and the wall.

Yes you can DIY this with the right collection of dryer cord, and 2x14-30R, but still would be spending around $40 just on parts. This is more expensive than a diy solution, but the build quality and finish really inspire confidence.

Works fine I use is to split my dryer and air compressor