"Game Genie" controller adapter lets you use other game controllers on Switch, and vice versa

It looks like an interesting product, but the press release and media below don't really instill confidence in me. Hopefully something a bit more professional and in proofread can come through.

Use your favorite controllers on other consoles.
GAME GENIE CONTROLLER ADAPTER: PC, PS3 & Nintendo Switch
SHIPPING: Week of August 21, 2017
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This adapter allows you to use the following controllers:

Nintendo Switch Pro Controller
Nintendo Switch Joycon ( Right & Left as a single controller)
Wii U Pro controller
XBOX ONE S
Playstation 3
Playstation 4
Wired USB ( Logitech F510, 310)

on the following:
Nintendo Switch ( USB A port )
PC (Windows 10, Windows 8 tested)
Playstation 3

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FEATURES:
PLUG & PLAY
DOES NOT BLOCK OTHER USB PORTS
USB PORT allows you to connect Wired USB controller & two players can control single character/etc ( Assist mode )
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SIMPLE TO USE:

SELECT DEVICE YOU ARE USING WITH ( NINTENDO SWITCH, PC, PS3 ) & Plug in USB Port.

STEP 1: PRESS SYNC on the GEME GENIE CONTROLLER ADAPTER

STEP 2: PRESS SYNC (or start sync mode) on the controller to be paired ( Only 1 controller can be used with the adapter. ( Joycon pair Right & Left. They appear as a single controller ). Pairs fast.

NOTE: Nintendo Switch has a USB A (F) port on the dock. Mini portable dock (DIY) also available from NEXiLUX