Rostra 250-8274 User manual

Installation / Owner’s Guide
250-8274
REV: 0

Page 2
Warning
This product is intended to assist in safe driving and to allow the driver to
have a broader rear view while the vehicle is in reverse. You, as the driver,
are solely responsible for the safe operation of your vehicle and the safety
of your passengers according to local traffic regulations. Do not use any
features of this system to the extent it distracts you from safe driving.
Your first priority while driving should always be the safe operation of
your vehicle. Rostra and it parent company, Voxx Electronics Corporation,
cannot accept any responsibility whatsoever for accidents resulting from
failure to observe these precautions or safety instructions.
1. This product utilizes high voltage. Any unauthorized modifications
or damage to the product may result in electrical shock. Handle all
components with care. Inspect regularly for damage to components
and cabling.
2. You are responsible for ensuring that the installation of this product
does not void or affect the vehicle manufacturer’s warranty. Rostra
and it parent company, Voxx Electronics Corporation, are not liable
in full or in part for improper installation resulting in loss or damage to
your property, or for voiding all or part of the vehicle manufacturer’s
warranty.
3. Do not apply excessive force to any of the components contained
within this kit. Excessive force used before, during or after installation
that results in a damaged or non-functional part will void all warranties.
4. Please follow the procedures in this installation manual. Improper
installation or modification of this product will void all warranties.
NOTE: When cleaning the mirror do NOT spray the mirror directly with cleaner.
Use a soft cloth with screen cleaner applied lightly, and wipe. DO NOT SOAK the
screen. Too much moisture could damage the electronics Inside and this is not
covered by warranty.
WARNING: Using the 2nd, 3rd, or 4th input to watch video of any kind while
driving Is always dangerous and may be illegal. The mirror monitor is not designed
to be used this way

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This mirror design integrates multiple camera views onto your vehicle’s
rear view mirror. The mirror is designed to mount on any vehicle with a
universal “Wedge” style mount. Additional adapters may be required. All
vehicle specific adapters are sold separately.
System Layout
Product Description
Video 1 (Front) Input
Video 4 (Rear) Input
Video 2 (Left) Input
Video 3 (Right) Input
Dash Control Switch
Video 4 (Rear) Trigger - Green
Video 2 (Left) Trigger - Pink
Video 3 (Right) Trigger - Purple
Acc. 12-Volt (+) Input - RED
Ground (-) Input - Black

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Installation
OEM Mirror Removal
Different vehicles have different mounting bracket styles. The
removal procedure is dependent on the vehicle maker or mirror
manufacturer. There are many methods to remove the original rear
view mirror, however, please don’t force the mirror off the bracket.
Rostra will not be responsible for damage caused to your vehicle by
incorrect installation of the mirror. Please refer to the OEM mirror or
vehicle manufacturer for the correct removal procedure.
Note: Always use caution, DO NOT force the mount. Rostra will not
be responsible for broken windshields. If you are not sure how to
remove or re-install the mirror seek trained, qualified help.
Wire Harness Installation
Video 1 (Front) Input
Video 4 (Rear) Input
Video 2 (Left) Input
Video 3 (Right) Input
Dash Control Switch
Video 4 (Rear) Trigger - Green
Video 2 (Left) Trigger - Pink
Video 3 (Right) Trigger - Purple
Acc. 12-Volt (+) Input - RED
Ground (-) Input - Black
Video Inputs:
Connect the camera video output to the corresponding camera video
input on the mirror wiring harness.
Dash Control Switch:
The dash control switch is used to change the camera view that is
displayed on the mirror. This can also be done using the “CH” touch button
on the mirror display.
Mount the dash control switch in a location that is easily accessible to
the driver. Be sure route this wire away form any moving parts such as the
steering wheel and the vehicle’s gear shifter.

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Installation (CONT)
Trigger Inputs:
• Pink - Video 2 (Left) Trigger Input: Connect this wire to the vehicle’s left
turn signal wire. This wire will test as a Positive (+) pulse while the left
turn signal is engaged.
• Purple - Video 3 (Right) Trigger Input: Connect this wire to the vehicle’s
right turn signal wire. This wire will test as a Positive (+) pulse while the
right turn signal is engaged.
• Green - Video 4 (Reverse) Trigger Input: Connect this wire to the
vehicle’s reverse signal wire. This wire will test Positive (+) while the
vehicle is in reverse gear.
Power / Ground Inputs:
The Red and Black wires are the main power supply for the mirror system.
This system may operate using a maximum of two amps (2A) of current.
Be sure to connect this to a vehicle circuit that can handle the additional
power requirement.
Red - Accessory 12-Volt (+): Connect this the vehicle’s main accessory
circuit. This wire will test 12-Volt (+) when the key is in the accessory and
ignition positions.
Black - Ground: Connect this wire to the vehicle’s chassis ground. If
possible this wire should be connected to a factory grounding location. If
one is not available this wire should be attached to the vehicle’s chassis
using a screw to make a secure connection.
Note: This system has a built-in delay timer that can be set to prevent
the video input from flashing ON/OFF with the vehicle’s turn signal pulse.
This feature will ensure that the video input will remain on the screen
until the turn signal is deactivated. The default setting is ten (10) seconds.
Reference “Menu Settings on page 8 for more information.

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Installation (CONT)
Wire Harness Installation

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Installation (CONT)
Windshield
1 2
1. Remove the original mirror and prepare 250-8273 for installation
• Inspect all parts of the 250-8273 to ensure no defects are
present before installation
• Using a supplied Torx wrench, loosen mounting set screw.
2. Install rear view mirror along this direction.
Note: Wire cover must be installed on the mirror mount before
installing onto the windshield wedge mount.
Mirror Installation (Universal Wedge Mount)

Page 8
Installation (CONT)
Windshield
3 4
Windshield
1. Make sure to install the mirror completely onto the universal
wedge mount.
2. Use the supplied Torx wrench to secure the mirror to the
universal wedge mount.
Note: Always use caution, DO NOT force the mount. Rostra will not
be responsible for broken windshields. If you are not sure how to
remove or re-install the mirror seek trained, qualified help.
CAUTION!
Dangerous Ok
Windshield
Windshield
DangerousOk

Page 9
Parking Line Adjustment
About Parking Guide Lines
Generally, to help drivers estimate the distance from obstacles, there are
three lines for reference; red, yellow and green. These lines are displayed
on the monitor when reversing. The green line is 3m away from the back
of car and the yellow line is 2m. The distant red line is 1m away from the
backside of car while the closed red line is 0.4m. Both reference lines on
the left and right should leave 0.2m from the car.
3m
1m
2m
0.4m
3m
2m
1m
MXT.71D
About Fixed Parking Guide Lines
Regular guide lines are fixed and cannot be moved, but the installation
sites of cameras and car sizes are different. The fixed guide line is not
accurate enough for drivers. The guide lines on this system can be
adjusted to fit the specific vehicle.
Fixed Guide Line Example

Page 10
Operation
1. Video Channel: Switch between available camera views.
2. Function Button: Selection Left/Down
3. Menu Access (Grid Line Adjustment)
4. Light Sensor
5. Power Button: Display On/Off
6. Indicator
7. Function Button: Selection Right/Up
8. Menu Select
Mirror Controls
Preferred Camera View
The Preferred Camera View can be used to quickly access the camera
view that is most helpful to the user (Example: Front Camera View. If the
user powers off the mirror by pressing the power button (5), the mirror will
automatically display the preferred camera view when powered back ON.
To change the preferred camera view:
• Press the “CH” button (1) on the mirror to cycle through the available
camera views.
• Stop when the preferred view is displayed.
3
1 2 4 5 6 7 8

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Operation
Automatic Display Control
This system is designed to automatically display that correct camera input
when it receives any one of three trigger inputs.
• Backup Camera: To display the backup camera engage the vehicle’s
reverse gear.
• Left or Right Blind Spot Viewing: To view the left or right blind spot
camera, engage the vehicle’s left or right turn signal.
• Front Camera Viewing: The front camera input is automatically
displayed for ten (10) seconds when the vehicle’s reverse gear is
disengaged.
Manual Display Control
This system can display each video input manually. This can be helpful to
monitor the vehicle’s blind spot when driving on the highway.
• Using Mirror Control: Press the “CH” button on the mirror to cycle
though the available camera views.
• Dash Control Switch: Press the dash control switch to cycle though
the available camera views.

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Display Modes
VIDEO 1
VIDEO 2VIDEO 3
edom 4 OEDIVedom 1 OEDIV
edom 3 OEDIVedom 2 OEDIV
VIDEO 4
edom 3 OEDIV+4 OEDIVedom 4 OEDIV+2 OEDIV
VIDEO 4+VIDEO 1 mode
VIDEO 2VIDEO 4 3 OEDIV4 OEDIV
1 OEDIV4 OEDIV
Available Display modes:

Page 13
Notes

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Notes

Page 15
Warranty
Voxx Electronics Corporation (the Company) warrants to the original purchaser of this
product that should this product or any part thereof, under normal use and conditions, be
proven defective in material or workmanship within 36 months from the date of original
purchase, such defect(s) will be repaired or replaced with new or reconditioned prod-
uct, (at the Company’s option) without charge for parts or repair labor. A transmitter for a
vehicle security or remote start system is warranted for 12 months from the date of original
purchase.
To obtain repair or replacement within the terms of this Warranty, the product is to be
delivered with proof of warranty coverage (e.g. dated bill of sale), authorization number,
specification of defect(s), transportation prepaid, to an approved warranty station. This
warranty is not transferable.
This Warranty does not cover damage to the vehicle’s electrical system or costs incurred
for the installation, removal or reinstallation of the product. This Warranty does not cover
batteries, broken LCD transmitter display screens, nor apply to any product or part thereof
which, in the opinion of the Company, has suffered or been damaged through alteration,
improper installation, mishandling, misuse, abuse, neglect, accident, or by removal or de-
facement of the factory serial number/bar code label(s).
This Warranty is in lieu of all other express warranties or liabilities. ANY IMPLIED WARRAN-
TIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, SHALL BE LIMITED TO
THE DURATION OF THIS WRITTEN WARRANTY. ANY ACTION FOR BREACH OF ANY WAR-
RANTY HEREUNDER INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY MUST BE
BROUGHT WITHIN A PERIOD OF 24 MONTHS FROM DATE OF ORIGINAL PURCHASE. IN NO
CASE SHALL THE COMPANY BE LIABLE FOR ANY CONSEQUENTIAL
OR INCIDENTAL DAMAGES FOR BREACH OF THIS OR ANY OTHER WARRANTY. No person or
representative is authorized to assume for the Company any liability other than expressed
herein in connection with the sale of this product.
The company does not warrant that this product cannot be compromised or circumvented.
THE EXTENT OF THE COMPANY’S LIABILITY UNDER THIS WARRANTY IS LIMITED TO THE
REPAIR OR REPLACEMENT PROVIDED ABOVE AND, IN NO EVENT, SHALL THE COMPANY’S
LIABILITY EXCEED THE PURCHASE PRICE PAID BY PURCHASER FOR THE PRODUCT WITH-
OUT INSTALLATION LABOR.
Some states do not allow limitations on how long an implied warranty lasts or the exclusion
or limitation of incidental or consequential damage so the above limitations or exclusions
may not apply to you. This Warranty gives you specific legal rights and you may also have
other rights which vary from state to state.
Voxx Electronics Corporation, 2351 J. Lawson Blvd., Orlando, Florida 32824
36 MONTH LIMITED WARRANTY

© 2022 Voxx Electronics Corp., 2351 J. Lawson Blvd. Orlando, FL 23824