MIDI 4x4 USB MIDI interface

4-IN,4-OUT MIDI interface(64 MIDI channels) low latency High-speed USB connection to PC or Mac MIDI in and MIDI out activity indicators for each port

Arturia MiniFuse 4 Portable 4x4 USB Type-C Audio/MIDI Interface, Blac

Um4x4 Usb Midi Interface 4 In /4 Out 64 Midi Channels 4i/4o + Merge 2i4o Midi Box 4x4 - Electric Instrument Parts & Accessories - AliExpress

MIDIFACE 4x4-MIDIPLUS

10 Best USB MIDI Interfaces 2020, UPDATED RANKING ▻▻ Disclaimer: These choices may be out of date. You need to go to wiki.ezvid.com to see, By Ezvid Wiki

Tapco by Mackie Link.MIDI 4-Channel USB MIDI Interface

M-Audio

Tapco by Mackie Link.MIDI 4-Channel USB MIDI Interface

4-in/4-out USB bus-powered MIDI interface

M-Audio Midisport 4X4 USB MIDI Interface

MIDI Interfaces — iConnectivity

UM4X4 USB MIDI Interface 4 IN /4 Out 64 MIDI Channels 4i/4o + Merge 2i4o MIDI Box 4X4 Perfect MIDI timing and High-speed - AliExpress