Most gooseneck FM transmitters use a flexible or adjustable “gooseneck” (sometimes called a flex‑neck) that lets you position the unit for convenient access and optimal visibility from the driver’s seat.
Common options are Bluetooth wireless streaming and a wired 3.5 mm auxiliary input. Some models also list USB‑C and USB‑A ports for audio or media playback.
Some models include built‑in USB charging ports—commonly a USB‑C and a USB‑A port. Listings often show ports around 12W each, allowing two devices to charge simultaneously, but available ports and power ratings vary by model.
They typically support Bluetooth for hands‑free calls and wireless streaming, and many also offer a wired 3.5 mm AUX input (built‑in or via an auxiliary cable) for direct audio connections.
They provide Bluetooth (or a wired input) and broadcast the audio over an unused FM radio frequency, letting the car’s FM radio receive the audio. Reviews note this works well in older cars that lack Bluetooth or an AUX input.