Multimedia connectivity — Bluetooth (for wireless streaming from phones, tablets, etc.), AUX/3.5 mm input, USB and/or SD/TF-card support for playing MP3s directly, and sometimes FM radio support.
Built-in amplifier — so you don’t need an external amplifier/receiver; plug in your source or stream over Bluetooth and the speaker handles powering the woofer and tweeter/satellite drivers.
Subwoofer + Full-Range Drivers — most Ailyons subwoofer/multimedia speakers are 2.1-channel or 3.1-channel systems (subwoofer + satellite/full-range speakers) rather than just a single driver, to cover bass, mids, and highs.