One Handed Mechanical Keyboard, Koolertron 23 Fully Programmable Keys and Portable Mini Macro Mechanical Gaming Keyboard with Red Switches and Adjusted Blue LED Backlit

Perhaps a little complicated to program. I still dont understand the layer lock/unlock process.That said you can use 3 layers without the lock, so have a multitude of output keys (cba working it out but 60 or so).Good enough that I bought a second one for another computer.Wish the manufacturers would stop putting stupid disco lights on them. Pointless and unwanted. Can be turned off so not a real complaint.