Common connectivity includes Bluetooth streaming, USB ports for playback from drives, a 3.5 mm AUX input and a headphone jack, plus FM radio tuners. Some listings explicitly call out a 3.5 mm connection type.
Speaker power ratings vary by model and are reported either as total stereo output or as per‑channel RMS. Example listings include totals like 4 W RMS, per‑channel figures such as 2×5 W RMS, and small speaker examples (two 2.25‑inch drivers) listed at 1 W RMS. These numbers are model‑dependent.
Many include AM and FM tuners with digital tuning and preset storage (examples list 20 AM and 20 FM presets). Units often include a telescopic FM antenna to improve reception.
Battery runtimes vary by model. One listing states about 8 hours of audio on battery power, while other units list a built‑in rechargeable battery (example: 3.7 V, 2000 mAh) for cordless use.
Some models explicitly do not play CD‑ROM, CDI, VCD, DVD, or other computer discs. They generally support commercial audio CDs and CD‑R/CD‑RW discs (including MP3 CDs).
