Can I just hook the red wire up to my vehicle's reverse trigger wire so it only receives 12v when the car's in reverse?

The camera seems to work just fine like this. If yours has an auto dimming or glare reduction it will require the +12 to go to an accessory powered circuit in order for that to work properly.

What button do you push to toggle between two cameras

There is no button to toggle. There are 2 inputs. Video, and Reverse. The reverse footage will come on any time that source gets input. Generally, you attach the reverse camera to your Reverse lights power, so the camera powers on(and in step, the screen) when you are backing up. When the reverse camera is on, you can press the power button on the mirror to turn on your "Video" input.

Le queda a una gmc sierra 2007

Si. Pero se requere electrosionita.

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Auto Adjusting Brightness LCD

Product ID: 44877358

Details

Auto Part Position
Rear
Brand
Master
Color
Mirror + LCD
Included Components
Rear View
Item Weight
2.4 pounds
Item dimensions L x W x H
13.1 x 6.1 x

🔄Auto-adjusting brightness sensor

🔗Universal fit with dual RCA inputs

🖥️4.3" high-brightness LCD screen

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Description

🚗 See More, Stress Less — The Ultimate Rearview Upgrade

DUAL VIDEO INPUTS - Switch effortlessly between two camera feeds for ultimate rearview awareness.
CRYSTAL CLEAR VISION - 4mm thick anti-glare glass ensures distortion-free rearview clarity.
PLUG PLAY INSTALLATION - All mounting hardware included for a quick, hassle-free setup.
SEAMLESS OEM REPLACEMENT - Fits popular brands with included universal mount—upgrade without compromise.
SMART BRIGHTNESS CONTROL - Automatically adjusts LCD brightness for perfect visibility day or night.

The Master Tailgaters 10.5" OEM Rear View Mirror integrates a 4.3" high-brightness LCD screen with auto-adjusting brightness and anti-glare glass, replacing your original mirror with universal fit mounts compatible with most vehicles. Featuring dual RCA video inputs for multiple camera feeds and easy installation, it enhances rear visibility and safety with a sleek, distortion-free design.

Specifications

ASIN	B06XHQ1QXX
Auto Part Position	Rear
Automotive Fit Type	Universal Fit
Best Sellers Rank	#15,240 in Electronics ( See Top 100 in Electronics ) #19 in Car In-Mirror Mounted Video Players #67 in Automotive Interior Rearview Mirrors
Brand Name	Master Tailgaters
Color	Mirror + LCD Screen
Compatible with Vehicle Type	Car
Customer Reviews	4.1 4.1 out of 5 stars (414)
EU Spare Part Availability Duration	3 years
Fit Type	Universal Fit
Global Trade Identification Number	06932705332091
Included Components	Rear View Mirror, Cable Assembly, Cable Cover, ZipTie, Universal Mounting Bracket
Item Dimensions	13.1 x 6.1 x 3.1 inches
Item Weight	2.4 pounds
Lens Curvature Description	Convex
Manufacturer	Master Tailgaters
Manufacturer Part Number	MR-43-A1
Material Type	Glass
Model Number	MR-43-A1
Mounting Type	Universal Mount
Number of Items	1
Number of Packs	1
Operation Mode	Power
Other Special Features of the Product	Reverse Assist
Shape	Rectangular
Size	Non-Recording (Replacement Rear View Mirror)
Unit Count	1 Count

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ƒ338

Duties & taxes included

In stock

Sold byAmazon ArubaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Aruba.

Secure transaction

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