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$10 Arduino-programmable WCH CH552 macro keyboard is configurable from a web browser - CNX Software
Programmable USB Key | PKEY-1208 from Rextron KVM Switches Supply
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X-Keys XK-4 USB Stick with Four Programmable Keys, Blue Backlighting XKS-04- USB-R
X-Keys XK-24 USB Programmable Keypad for Windows or Mac
10 Keys Programmable Macro Mechanical Keyboard Support Linux Windows Macos Micro Usb Hot Key Mini Keyboard For Gaming Cad Mouse - Keyboards - AliExpress