M-Audio continues to revise and reboot its classic Oxygen range of MIDI keyboards, with the latest versions - known as the MKV models - getting smart controls, auto-mapping, and a built-in arpeggiator ...

which positioned the pitch and mod wheels above the keyboard. The back of the controller is quite concise, featuring a USB and sustain pedal jack. The new Oxygen series doesn’t incorporate a MIDI jack ...

There's the M Audio Oxygen series. Comes in multiple sizes including a 25 key one If you really just need some buttons to hit, and want something super small, there's the Korg Nanokey.