na-adjective
Used in computing contexts to describe software or devices that can be carried and used on different systems without installation.
このアプリは携帯可能なので、USBメモリに入れて持ち運べます。
This application is portable, so you can carry it on a USB flash drive.
ポータブル is a more general term for portable devices or software, while 携帯可能 is a technical term often used in computing specifications.
Compound of 携帯 (keitai, 'carrying') and 可能 (kanō, 'possible').