Portable keyboards here are slim computer boards you fold or slip beside a tablet, not full-size office units and not piano keys.
- Measure packed thickness and whether the hinge locks so the board does not flop on a tray table.
- Confirm Bluetooth pairing for iPad, Android, or Windows and whether a second device can stay saved.
- Check key pitch and whether the layout includes a trackpad if you travel without a mouse.
Choose the fold or slim slab that pairs with your tablet OS and still lets you type emails without hunting for letters.