radio box

Common sources include AM/FM radio, CD and cassette players, Bluetooth streaming, USB and SD card playback, 3.5mm AUX/line-in jacks, and microphone inputs (for recording or karaoke).

Many units use built-in or telescopic FM antennas, and several models include digital tuning (PLL) with station presets to make finding and recalling stations easier.

Portability ranges widely: pocketable radios can be under 5 inches tall and weigh about 0.2–0.75 lb, while full boomboxes can be much larger (up to several feet wide in some listings) and weigh as much as roughly 18 lb, often with carrying handles.

Most units offer Bluetooth streaming plus wired options such as a 3.5mm AUX/line-in jack. Some also include USB or SD card slots for direct playback and microphone inputs for recording or karaoke.

Many models can run on batteries for portable use and include AC power cables for continuous operation. Battery playtime varies with battery type and condition, making battery-powered operation useful during travel or outages.