M-audio Midisport 1x1 Ver.2 (USB Midi Interface), 2006, made in China

Link: m-audio | 64-bit MIDI device driver for MacOS v10.14+ (Mojave/Catalina/Big Sur)

Features:
- 1-in/1-out MIDI interface
- 16 discrete MIDI input channels
- 16 discrete MIDI output channels
- Bus-powered—requires no external power supply
- Extremely compact and lightweight for mobile or desktop use

Specifications Size/Weight:

4” (w) x 1-3/4” (d) x 2-1/4 (h)

0.15 lbs.