01
Prepare the card
Use a Class 10 microSD card, 32–256GB. Back up important clips; format in the camera before first use.
← All product support
Mirror dash cam / Product supportM3.
M3.
Every view.
One clear guide.
Set up your mirror camera, find your footage and get help with the right model resources.
Download M3 guide01 / A good first start
Ready before you drive.
Set up while parked. Keep the camera and cables clear of your driving view and vehicle safety equipment.
02
Mount & connect
Secure the mirror, connect the rear camera and GPS module, then check every camera view.
03
Check your power
M3 uses a supercapacitor and needs external power. Use its Rexing-approved vehicle charger.
Before your first trip: Make a short test recording, play it back and confirm the timestamp. Keep an original copy of any footage you need to preserve.
02 / At your fingertips
Navigate the mirror.
A dark display does not by itself confirm that the camera has stopped recording. Check power and recording status before troubleshooting.
Switch your view
Swipe left or right between Front, Rear, Cabin and All. Swipe up or down to adjust the visible range.
Screen versus device
A short power-button press toggles the screen; hold for three seconds to switch the device on or off.
Change settings
Stop recording before opening Settings. Confirm changes, then check that recording resumes.
03 / Find the footage
Review. Save. Share.
- Play it on the mirrorOpen Playback and choose a recording.
- Keep a separate copyPower down before removing the card. On a computer, normal clips are in Video; locked clips are in event.
- Protect your evidenceCopy the original files before editing, sharing or formatting. Keep the date, time and camera view with your notes.
04 / When parked
Match the mode to the kit.
Identify your accessory before changing settings. Parking recording depends on the power available to the camera.
Camera parking settings
Describe the behavior you need and share the kit label with support. Do not apply another model’s wiring or parking instructions to your M3.
Confirm the exact kit firstIntelligent motion detection
The manual specifies the separate Rexing Intelligent Hardwire Kit, UPC 810046603178. With that kit, turn the camera’s Parking Mode off.
Kit required • Sold separatelyIf parking recording stops
Check the kit’s power supply and battery-protection indicator, if present. If the kit cuts power at its low-voltage threshold, the camera cannot record until power is restored. Ask support to verify your kit and settings rather than bypassing battery protection.
05 / Solve the basics
A clearer next step.
Include your model label, firmware version and a short description of when the issue occurs.
The screen is black. What should I check?
Check the vehicle outlet, power cable and connector seating while parked. Distinguish a sleeping display from a camera without power. If the problem continues, send support a short video of the startup behavior.
I get a card error. What now?
Save accessible footage first. Record the exact error and card brand, capacity and age. Test with a suitable replacement if available. Formatting deletes recordings, so back up files before trying it.
My rear image is upside down or mirrored.
Use the rear-camera horizontal and vertical flip settings. Recheck orientation while parked.
Can I use firmware from a similar mirror camera?
Use only firmware confirmed for your exact model and hardware version. A similar name or appearance is not enough. Send support photos of the camera label and firmware screen before updating.
06 / Keep these handyContact support
Your M3 resources.
M3 user manualOfficial model guide • PDF ↗Firmware resourcesVerify model & version before updating ↗Warranty & returnsFind coverage and request help →
Still need a hand?
Have your model, firmware, card and power-kit details ready.
Model reference: Rexing M3 User Manual, revision December 2023. Follow the guide for your exact hardware and accessories.