Rexing FM Transmitter Car Charger W Review: Bluetooth 5.0 Audio for Your Car
If your car’s stereo still runs on AM/FM radio and you want to stream Spotify, take calls, or listen to podcasts without a full head unit swap, the Rexing FM Transmitter Car Charger W is the bridge. It plugs into your 12V cigarette lighter or dash outlet, pairs over Bluetooth 5.0, and broadcasts your phone’s audio to your car speakers on an FM frequency you can tune to. You also get a USB charging port on the back of the unit, so your phone stays topped off while you drive. It is not a wired connection and it will not sound like a dedicated aftermarket amp, but for drivers who want a low-cost, no-drill upgrade to a factory radio that predates Bluetooth, it does the job cleanly.
What the official page lists
Rexing’s product page for the Rexing FM Transmitter Car Charger W confirms the following:
| Spec | Detail |
|---|---|
| Bluetooth version | 5.0 |
| Power source | 12V car cigarette lighter / dash outlet |
| Audio output | FM radio broadcast (tune your car radio to the paired frequency) |
| Phone charging | USB port on the unit (verify amperage on the Rexing product page for your specific phone’s fast-charge needs) |
| Customer support | US-based support |
| Replacement policy | 18-month free replacement (confirm current terms on the Rexing store) |
| Design note | Rexing states it designs, tests, and manufactures its devices in-house for reliability and longevity |
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The official page does not list a specific wattage for the USB output or a precise FM frequency range (typically 76–108 MHz for US cars). If those numbers matter for your setup—say, you need 2A+ fast charging—verify the exact amperage and frequency band on the Rexing product page before ordering.
What reviewers say
Reviews from YouTube say this about the Rexing FM Transmitter Car Charger W.
A YouTube walkthrough of top FM transmitters for cars notes that the category offers “each with their own strengths,” and the Rexing unit appears in that tier of compact, plug-and-play transmitters. That framing fits: the job here is simple—get phone audio into a radio that has no Bluetooth port—and the form factor (a single 12V plug) keeps installation to under a minute.
Another YouTube review of a Bluetooth FM transmitter car charger with hands-free calling highlights the core use case: pairing a phone, tuning the car radio, and driving without touching the phone. The Rexing FM Transmitter Car Charger W occupies that same lane, with the added convenience of a rear USB port so you are not juggling a separate charger in the same outlet.
A third YouTube video reviewing a Bluetooth wireless car FM transmitter charger with hands-free phone calling reinforces that drivers in this category are looking for one device that handles audio streaming and call handling. If that is your priority, the Rexing unit’s Bluetooth 5.0 pairing and integrated USB output cover both without a second accessory.
Who it’s for
The Rexing FM Transmitter Car Charger W makes the most sense if your car’s stereo is a basic AM/FM unit with no Bluetooth or auxiliary input. That is still common in vehicles from the mid-2000s through early 2010s, and in many fleet or work trucks where a full head unit replacement is not worth the cost.
- Older car owners who want phone audio and call handling without a $300+ aftermarket radio install.
- Drivers who want one plug to do two jobs: stream music and keep the phone charged from the same 12V outlet.
- People who prefer a no-drill solution: the unit sits in the cigarette lighter socket and pulls out when you park in a garage or leave the car.
- Riders who already own a Rexing dash cam and want a matching brand for the audio side of the cabin. If you are also comparing camera options, the Rexing R316 4K Dash Cam with Wi-Fi & GPS pairs well in the same vehicle.
Who should skip
If your car already has Bluetooth built into the head unit, or a 3.5mm auxiliary input, the Rexing FM Transmitter Car Charger W adds a step (pairing to the transmitter, then tuning the radio) without improving sound quality.
- Drivers with Bluetooth-capable factory radios: a direct Bluetooth connection to the head unit will sound cleaner than an FM rebroadcast.
- Audiophiles: FM rebroadcasting introduces slight compression and potential interference from nearby stations; it will not match a wired or Bluetooth-direct connection.
- People who need high-wattage fast charging: if your phone requires 25W+ for fast charging, verify the USB output on the Rexing product page before relying on this unit as your primary charger.
- Drivers in areas with dense FM congestion: if every frequency between 87 and 107 MHz is occupied by local stations, you may struggle to find a clean channel.
Mid-check
If the criteria above already match how you actually use the space, stop here and check current options before you keep reading comparison noise. Confirm details on the current product page.
How to choose in five minutes
Before you plug the Rexing FM Transmitter Car Charger W into your car, spend five minutes confirming three things:
- Does your car radio have Bluetooth or an aux input? If yes, a direct connection will outperform an FM transmitter. If no, this is the right tool. See options
- Is your 12V outlet accessible and not already occupied? The unit needs a free cigarette lighter or dash socket. If your only 12V port is behind a center console or in a tight dash cluster, check that the plug will not block a gear shifter or steering column. See options
- What FM frequency is free near your location? Tune your car radio slowly from 76 to 108 MHz and note any quiet gaps. You will set the transmitter to one of those frequencies during pairing. If your area is packed with stations, you may need to drive to a less congested frequency or accept slight bleed-through. See options
If all three checks pass, the Rexing FM Transmitter Car Charger W is a straightforward, low-risk addition. You can also browse car audio upgrade guides for context on when a full head unit swap makes more sense.
FAQ
How does the Rexing FM Transmitter Car Charger W connect to my car? It plugs into your 12V cigarette lighter or dash outlet. You pair it to your phone via Bluetooth 5.0, then tune your car’s AM/FM radio to the frequency the transmitter broadcasts on. There is no wiring into the head unit.
Does the Rexing FM Transmitter Car Charger W charge my phone? Yes. The unit has a USB port on the back for phone charging. Verify the exact amperage on the Rexing product page to confirm it meets your phone’s charging needs, especially if you use fast charging.
What is the warranty or replacement policy for the Rexing FM Transmitter Car Charger W? Rexing lists US-based customer support and an 18-month free replacement policy for its products. Confirm the current terms and any registration steps on the Rexing store before your purchase.
Will the Rexing FM Transmitter Car Charger W work with Android and iPhone? Bluetooth 5.0 is supported by both Android and iOS devices. Pairing follows the standard Bluetooth process: enable Bluetooth on your phone, put the transmitter in pairing mode, and select it from your device list.
Can I use the Rexing FM Transmitter Car Charger W while the car is off? The unit draws power from the 12V outlet, so it will only operate when the car’s ignition is on (or the outlet is switched-on). If you leave it plugged in with the car off and the outlet is still live, it may drain the car battery over time. Unplug it when the vehicle is parked for extended periods.
Is the Rexing FM Transmitter Car Charger W the same as the Rexing FM3? The Google search suggestions show people looking for “Rexing FM3 FM Transmitter Car Charger with Bluetooth 5.0” and “Rexing FMT2.” The Rexing FM Transmitter Car Charger W is the specific SKU on this page. If you see a different model number (FM3, FMT2) in search results, verify on the Rexing store whether it is the same unit or a different variant before purchasing.
Bottom line
The Rexing FM Transmitter Car Charger W is a practical, no-drill way to add Bluetooth audio and phone charging to a car that still runs on a basic AM/FM radio. It will not replace a dedicated aftermarket stereo, and the FM rebroadcast will not match the clarity of a wired or direct Bluetooth connection. But for the specific job—getting phone audio into a car that has no other option, while keeping the phone charged from the same outlet—it is a clean, compact solution backed by US-based support and an 18-month free replacement policy. If your car’s stereo predates Bluetooth and you are not ready for a head unit swap, this is the low-effort upgrade that gets you there.
Sources
- YouTube — https://www.youtube.com/watch?v=gPsw_JE2jgk&t=17s
- YouTube — https://www.youtube.com/watch?v=jZx4aFv3POY
- YouTube — https://www.youtube.com/watch?v=ImrX-5K12qo
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