Korg nanoKEY Fold Black

Pros
Fine as a additional controller for grooveboxes and compact sound modules
Small, compact and portable
It has options and functions such as arp, chords, scales, split
Pitch & Mod surface
Additional utility software
Works with Android apps on the tablet

Cons
No BT
It's not even comparable to a keyboard
No battery
For MIDI out needs to be powered via powerbanks on USB-C port
It does not work with every Powerbank
No aftertouch
Plastic casing