FM transmitters have been around for quite a while and have improved over the years with the addition of new features. This option from Aukey has Bluetooth built-in, as well as a 3.5mm Aux jack for when you'd rather just plug a phone in. Using coupon code AUKEY2BR during checkout will drop the price down to $9.91, which is the best deal we've seen on this yet. In September we shared a deal when it dropped to around $12, but it has been selling for around $16 since then.

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Installation is super simple: plug the FM transmitter into the cigarette plug, find an unused FM station in your area, tune both your radio and the transmitter to that station, and connect your phone to it. In addition to being able to play music from your phone through your vehicle's speakers, this can also charge your phone at up to 2.4A by plugging a USB cable into it.

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