An FM transmitter is the answer to an old car stereo with no Bluetooth: music from the phone goes out on an unused radio frequency, and the device itself runs off the 12 V socket. Almost all the Baseus, Hoco, Forever and XO models double as a car charger with USB-A and USB-C ports, and some also offer 30 W fast charging. If the stereo has an AUX input, a Bluetooth receiver with a 3.5 mm cable will give cleaner sound — there are a few of those here too.
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An FM transmitter is the answer to an old car stereo with no Bluetooth: music from the phone goes out on an unused radio frequency, and the device itself runs off the 12 V socket. Almost all the Baseus, Hoco, Forever and XO models double as a car charger with USB-A and USB-C ports, and some also offer 30 W fast charging. If the stereo has an AUX input, a Bluetooth receiver with a 3.5 mm cable will give cleaner sound — there are a few of those here too.