Sizes range from palm-size cylinders a few inches tall up to larger tabletop boomboxes. Listed heights span about 3 inches to roughly 13 inches, and weights range from under a pound to around 3–4 pounds.
Some larger portable speakers add companion apps and multi-speaker connectivity, built-in powerbanks to charge mobile devices, and enhanced audio processing (for example, AI sound boost or support for lossless playback).
Runtimes vary by size: the smallest portable speakers show about 7–9 hours, compact rechargeables about 12 hours, and larger portable speakers up to around 28 hours.
Common extras include CD and cassette playback, programmable track memory, anti-skip protection, one-touch recording, skip/search/forward/back controls, and repeat/program functions.
