The AUTO-VOX RC04 is a 4K rear-view mirror camera that adds wireless CarPlay and Android Auto integration on top of dash cam recording, aimed at drivers who want smartphone mirroring and dash cam functionality combined into one mirror unit rather than separate devices.

Key Specs
| Spec | Detail |
| Display | 11.26″ split-screen mirror display |
| Cameras | 4K front camera plus 1080p rear camera, dual recording |
| Smartphone Integration | Wireless CarPlay and Android Auto built into the mirror |
| Viewing Mode | Split-screen showing navigation or phone apps alongside the camera feed |
| Extras | Parking assist guidelines, 24/7 monitoring support, multiple audio output options |
| Storage | microSD required, Class 10 or higher recommended, up to 128GB |
| Price Tier | Mid-range mirror dash cam, above basic single-camera mirror cams |
| Compatibility | Fits most standard rearview mirrors; wireless CarPlay needs an iPhone, wireless Android Auto needs a compatible Android phone |
What CarPlay Integration Actually Adds
Rather than needing a separate CarPlay-compatible head unit or aftermarket stereo, the RC04 brings wireless CarPlay and Android Auto to any vehicle through the mirror itself. This is particularly useful in older vehicles without built-in smartphone integration, letting you add it without replacing the factory stereo. The wireless connection also means you are not hunting for a cable every time you get in the car, and the phone can stay in a pocket or bag rather than plugged in and exposed on the dash.
The split-screen mode is the other piece that separates this from a plain dash cam. You can keep turn-by-turn navigation visible on one side of the display while the dash cam feed runs on the other, which is genuinely more useful day-to-day than switching between a phone mount and a separate camera screen.
Combining CarPlay/Android Auto with dash cam recording in one mirror is a genuinely different value proposition than a standard mirror dash cam — it’s solving two separate problems (smartphone integration and dash cam recording) that would otherwise mean two separate aftermarket installs in an older vehicle.
Installation Basics
- Mount the RC04 over your existing rearview mirror using the included straps or bracket
- Install the separate rear camera at the back of the vehicle
- Connect power via the 12V adapter, routing the cable along the windshield trim
- Pair your phone via Bluetooth or USB for wireless CarPlay/Android Auto, following the on-screen setup
For full specs, see AutoVox’s official product catalog.
Choosing and Formatting a microSD Card
The RC04 records to a microSD card rather than internal storage, so card choice matters more than most buyers expect. A Class 10 or higher card handles the sustained write speed that continuous 4K front recording needs; a slower card is the most common cause of dropped frames or corrupted loop-recording files on mirror dash cams generally, not just this one.
- Use a reputable brand card rated Class 10 (or UHS-I) and sized up to the unit’s supported capacity
- Format the card through the RC04’s own menu after inserting it, rather than formatting on a computer first
- Reformat every so often, since fragmented loop-recording writes can slow a card down over months of continuous use
Troubleshooting Setup, Pairing, and Recording Issues
Ryan installed an RC04 in a family member’s older sedan that had no factory CarPlay support, and the two hiccups that came up during that install cover most of what other owners run into as well: a wireless CarPlay pairing that would not stick, and a rear camera cable that needed re-seating after the headliner trim was reattached.
- Wireless CarPlay won’t connect or keeps dropping: forget the connection in your phone’s Bluetooth settings and re-pair from scratch, and make sure your phone’s Wi-Fi is turned on, since wireless CarPlay uses Wi-Fi Direct alongside Bluetooth for the initial handshake.
- Android Auto shows a black screen after connecting: confirm the Android Auto app itself is updated on your phone, then power-cycle the mirror unit; a stale app version is a more common cause than a hardware fault.
- Rear camera has no picture or a scrambled image: check the cable connection at the mirror and at the rear camera itself, and inspect for a pinched cable if it was routed through door seals or the trunk trim during installation.
- Mirror won’t stay mounted over the factory mirror: re-tighten the strap clamps and confirm the factory mirror width matches the bracket’s adjustable range before assuming the unit is defective.
- No power after installation: verify the 12V adapter is seated fully in the accessory socket and that the socket is live with the ignition on, since some vehicles disable accessory sockets in certain ignition positions.
If wireless CarPlay refuses to cooperate even after re-pairing, the practical alternate path is to fall back on wired CarPlay through your phone’s charging cable while you troubleshoot the wireless connection separately; this confirms whether the fault is the phone’s wireless handshake or the mirror unit itself before you spend more time on it.
Frequently Asked Questions
Does CarPlay work wired or only wirelessly?
The RC04 supports wireless CarPlay and Android Auto, avoiding the need for a cable connection to your phone during driving.
Can I use the dash cam features without connecting CarPlay?
Yes, dash cam recording works independently of whether you’ve connected a phone for CarPlay or Android Auto.
Is professional installation recommended?
It’s designed for DIY installation, though routing the rear camera cable neatly takes some care regardless of your vehicle.
Does the split-screen slow down navigation responsiveness?
Generally no, though performance can vary depending on your specific phone and its CarPlay/Android Auto connection quality.
What size microSD card does the RC04 need?
A Class 10 or higher card is recommended, with support up to 128GB; a slower or lower-capacity card is the most common cause of choppy playback or missed loop-recording segments.
Can I install the RC04 myself without a mechanic?
Yes, most owners install it themselves in under an hour. The part that takes the most patience is routing the rear camera cable neatly along the headliner and door trim.
Conclusion
The RC04 is a strong option if you want to add both CarPlay/Android Auto and dash cam recording to a vehicle that doesn’t already have smartphone integration built in. It’s solving two separate upgrade needs in one mirror unit rather than requiring two aftermarket installs.
Ryan T. is a PC hardware enthusiast with 15+ years of experience fixing drivers and testing consumer tech. He writes for softwaredriverdownload.com.