VIOFO A139 Dash Camera USER MANUAL

Table of Contents

1. Product Overview

• Standard Items
• Optional Accessories
• Product Diagram

2. Installation

• Inserting / Remove the Memory Card
• Install Front Camera
• Install Rear Camera
• Install Interior Camera (Optional)
• Remove Cameras

3. Dash Cam Recording Operation

• Power On / Off
• Loop Recording
• Emergency Recording
• Disable / Enable Audio Recording
• Parking Mode
• View on a TV

4. Play and Manage Videos

• Playback Video
• Delete Video
• Video File Storage Location

5. Review and Control on Smartphone

• Connect to Smartphone
• APP Layout Overview

6. Install Accessories

• CPL
• Bluetooth Remote Control
• External Microphone
• Screw Mounting Bracket

7. Systems Setting

• Video Setting
• System Setting
• Other

8. Firmware Upgrade

9. Notice

10. Customer Service

Product Overview

Standard Items

The standard items included with the VIOFO A139 Dash Camera are:

• Front Camera
• Rear Camera
• Rear Camera USB Cable (6M)
• Car Charger Adapter
• Type-C Cable
• GPS Module (base)
• Card Reader Adapter
• Circular Polarizing Lens Filter
• Trim Removal Tool
• Static (Windshield) Stickers
• Front Mount +3M Sticker
• Rear Mount +3M Sticker

Optional Accessories

Optional accessories available for the VIOFO A139 include:

• Interior Camera
• Interior Camera Cable (1M)
• Bluetooth Control
• VIOFO Hardwire Kit for Car Dash Camera (ACC, GND, POWER)
• External Microphone

Product Diagram - Front Camera (Main Unit)

The front camera unit has the following labeled components:

• 1. AV Out
• 2. External Microphone Port
• 3. Screw Hole
• 4. Rear Camera Port
• 5. Interior Camera Port
• 6. Power In / microSD Card Reader Mode (computer)
• 7. Screw Hole
• 8. microSD Card Slot
• 9. Rotatable lens
• 10. Power On | OFF button
• 11. Recording Start | Stop button
• 12. Video Protect button
• 13. Microphone On | OFF button
• 14. Wi-Fi On | OFF button
• 15. GPS Module port
• 16. Reset Hole
• 17. Microphone
• 18. Recording Status Indicator LED
• 19. Microphone Status Indicator LED
• 20. GPS Status Indicator LED
• 21. Wi-Fi Status Indicator LED

Rear Camera

The rear camera has the following components:

• 1. Bracket
• 2. Power In port
• 3. Lens

Interior Camera (Optional)

The optional interior camera has the following components:

• 1. Bracket
• 2. Power In port
• 3. Lens
• 4. Infrared LED

LED Indicators

Buttons and Icons

Installation

1. Inserting / Removing the Memory Card

Insert the Memory Card

Ensure the metal contacts on the memory card face away from the VIOFO logo side of the main unit. Ensure the camera is turned off and push the memory card into the card slot until you hear a click. ℹ️ Note: When using the memory card for the first time, it must be formatted as FAT32; other formats are not supported. The microSD card must be High Endurance type, have a UHS-U1/U3 or above rating, and a capacity up to 256GB. VIOFO recommends its own brand memory cards for durability and reliability. Formatting will permanently erase all data on the microSD card.

Remove the Memory Card

Ensure the camera is turned off, then push the edge of the memory card with your fingernail. The card will spring out enough to be removed.

⚠️ Warning: Please turn off the A139 before inserting or removing the microSD card. Inserting or removing the microSD card while recording may destroy the files.

Format the Memory Card

You can format the card in the camera via the VIOFO app, or on your computer using the FAT32 system.

2. Install Front Camera

Install the Mount

Slide the mount horizontally into the slot on the back of the camera.

Mounting Location and Power Connection

1. Select a location on the windshield behind the rear-view mirror.
2. Wipe the installation surface clean with a damp cloth to ensure it is grease-free for the sticky pad.
3. Apply water to the windshield and attach the static stickers.
4. Peel the protection film off the sticky pad and camera lens.
5. Fix the front camera onto the static stickers. Static stickers are reusable and allow repositioning.
6. Adjust the lens angle up or down as necessary. ⚠️ Never rotate the lens completely; doing so may void the warranty.
7. Plug the USB power adapter into your vehicle's 12V / 24V power socket. Insert the 4-meter power USB cable's Type-C connector into the camera's mount port.

The final installation provides a clean look. The front camera can also be mounted to the left of the rearview mirror. The power can be connected via a cigarette lighter socket.

3. Install Rear Camera

1. Select an installation location on the windscreen, avoiding defrost grid wires, where the camera can capture the entire rear view.
2. Wipe the installation surface clean with a dry cloth.
3. Peel the protection film off the sticky pad and camera lens.
4. Fix the rear camera in the selected location.
5. Connect the rear camera cable to the front camera (main unit) after powering off the product. Cable routing should follow the provided diagrams. Use cable clips for secure and neat routing.

4. Install Interior Camera (Optional)

1. Select an installation location on the windscreen, avoiding defrost grid wires, where the camera can capture the entire interior view.
2. Wipe the installation surface clean with a dry cloth.
3. Peel the protection film off the sticky pad and camera lens.
4. Fix the interior camera in the selected location.
5. Connect the interior camera cable to the front camera (main unit) after powering off the product.

5. Remove Cameras

To remove cameras, unplug all cables first. ℹ️ Note: Always turn off the camera before unplugging the rear or interior camera.

Installation Tips

• Do not install the camera where it obstructs the driver's visibility or safety.
• Mount the camera close to the rearview mirror for optimal field of view coverage.
• Position the lens within the windshield wiper's sweeping range for clear visibility in rain.
• Avoid installing the camera on or near airbag panels.
• Ensure the mounting location is not affected by window tint or other electronic equipment for best performance.

Dash Cam Recording Operation

Power On/Off

The camera automatically turns on and begins recording when the engine starts. It stops recording and turns off when the engine is switched off or the charging cable is unplugged.

Loop Recording

Loop recording starts automatically when the camera detects power with a microSD card inserted. Video files are recorded in 1, 2, 3, 5, or 10-minute segments. When the microSD card is full, the oldest files are automatically overwritten. Loop recording files are saved in the DCIM\MOVIE folder.

Emergency Recording

• Automatic Emergency Recording: When the G-sensor detects a collision, current footage is automatically locked to prevent overwriting.
• Manual Emergency Recording: Press the [Video Protect button] during recording to lock the current footage.

ℹ️ Note: Collision sensing sensitivity can be adjusted via the VIOFO App under the "G-sensor" option. Locked files are saved in DCIM\Movie\RO.

Disable / Enable Audio Recording

Press the [MIC button] once to turn audio recording on or off. The MIC LED will be off or solid Red accordingly.

Parking Mode

There are three parking mode options:

1. Auto Event Detection: Records a video sequence (15 seconds before to 30 seconds after an event) when a moving object is detected. Recording stops if no new movements occur.
2. Time Lapse Recording: Records video at low frame rates (1, 2, 3, 5, 10, or 15 fps) continuously without audio.
3. Low Bitrate Recording: Records video in low bitrate for all cameras (front, interior, rear) continuously in small file sizes with audio.

ℹ️ Note: Audio cannot be recorded in time-lapse mode. For parking mode recording, VIOFO recommends the HK3-C ACC hardwire kit cable to provide continuous power and protect the car battery.

View on a TV

The camera features an AV out port for connecting to an external display like a monitor or TV. A 3.5mm male to 3 RCA AUX cable is required but not supplied.

Play and Manage Videos

Playback Video on VIOFO app

Long press the [Wi-Fi button] to enable Wi-Fi. Open the VIOFO app and select "Connect your camera" to control the dashcam and manage files. Refer to the "Review and Control on Smartphone" section for app details.

Playback Video on PC

1. Remove the memory card from the dashcam after powering it off.
2. Insert the memory card into a memory card reader connected to your PC.
3. Open the DCIM folder and use a video player like VLC to playback the videos.

Video File Storage Location

File Format Definition

Files are saved separately for the front, interior, and rear cameras.

File Naming Convention:

• Example: 2020_1018_170010_062PF.MP4
• P: Front camera
• I: Interior camera
• R: Rear camera
• P: Video recorded in parking mode
• Format: Year_Date_Time_SequenceNumber

Review and Control on Smartphone

Connect to Smartphone

The VIOFO app allows remote control, live preview, and video playback. Download the app from Google Play for Android devices or the App Store for iOS devices. You can also download the APK directly from the official VIOFO website: https://www.viofo.com/content/13-app.

Connect VIOFO APP

1. Long press the [Wi-Fi button] to turn on Wi-Fi. The Wi-Fi name (SSID) is VIOFO_A139_XXXX, and the default password is 12345678. The Wi-Fi Status LED will flash blue when Wi-Fi is on.
2. Connect your phone to the A139 Wi-Fi. The camera's LED lights will turn solid blue once connected.
3. Open the VIOFO app and choose "Connect your camera".
4. You can now view live feeds from all cameras, change settings, and manage files.

APP Layout Overview

The app interface includes:

• Menu: Access main features.
• Downloaded Video: View downloaded video files.
• VIOFO Official Facebook Page: Link to VIOFO's Facebook.
• Official Support: Access support resources.
• Firmware Update: Check for and install firmware updates.

The live view screen allows you to see feeds from individual cameras, check recording status, motion detection status, switch cameras, and take snapshots. The camera file screen allows you to view video file lists, download files, and delete files.

Install Accessories

Install CPL

The CPL (Circular Polarizing Lens) reduces reflections and glare, improving image quality similarly to polarized sunglasses, resulting in more saturated video. Align the white symbols on the camera and CPL during installation.

Install Bluetooth Remote Control (Optional)

Mount the remote control on a suitable dashboard location. Power on the camera, then press and hold the video lock button on the remote for 3 seconds to pair. The LED indicator on the remote will turn blue upon successful pairing.

Install External Microphone (Optional)

The A139 supports an external microphone with a 3.5mm jack. Plug it directly into the dashcam for improved sound quality compared to the built-in microphone.

Systems Setting

Access settings via the VIOFO app while the camera is stopped from recording.

Video Setting

• Resolution: Configure video resolution for front, rear, and interior cameras (e.g., 2560*1440P 30/60fps, 1920*1080P 30fps).
• Time-lapse Recording: Records video at specific time intervals to save memory and reduce review time. Default is off.
• Loop Recording: Options for Off, 1, 2, 3, 5, or 10 minutes. Recording starts automatically; old files are overwritten when the card is full.
• Recording Audio: Turn the microphone on or off using the [MIC button].
• Exposure: Adjust EV (Exposure Value) from -2.0 to +2.0 for front, interior, and rear cameras to optimize footage in different lighting conditions. Default is 0.0.
• WDR (Wide Dynamic Range): On/Off to improve exposure in varying lighting situations.
• G-Sensor: Measures shock forces and locks video. Sensitivity can be set from "low" to "high". "Low" is recommended.
• Date Stamp: On/Off to imprint the time and date on recorded video.
• Bitrate: Set video bitrate for quality vs. recording time trade-off. High bitrate offers better quality but uses more space.

System Setting

• Wi-Fi Channel: Off, 2.4GHz, or 5GHz. 5GHz is recommended.
• Time Zone: Set for GPS time and date calibration. Manual adjustment for daylight savings is noted.
• Time Synchronization: Sync time with your mobile phone.
• Date Format: Choose the desired date format.
• Boot delay: Set a delay for camera boot-up (Off, 5s, 10s).
• IR LED: Off, On, or Auto. "On" forces black and white video. "Auto" adjusts based on light. "Off" disables IR LEDs. Can be toggled with the [IR LED button].
• Parking Mode: Options include Auto Event Detection, Time Lapse Recording, and Low Bitrate Recording.
• Enter Parking Mode Timer: Set a delay (e.g., 90s) before entering parking mode after the engine is off (requires hardwire cable).
• Parking Recording Duration: Set to "On" to record until power is cut, or "1 hour" for a fixed duration.
• Parking G-sensor: Adjust sensitivity for detecting impacts or collisions. "High" sensitivity is suggested.
• Parking Motion Detection: Adjust sensitivity to avoid false triggers from wind or rain.
• Image Rotation: Options for Off, Front Only, Interior Only, Rear Only, or Both.
• Voice Notification: Turn voice notifications on/off and select language.
• Notification Sounds: Enable/disable beep warnings and startup sounds.
• Live Video Source: Select which camera(s) to view live (Front, Interior, Rear, or All).
• GPS: Turn GPS logger on/off to record location data, speed, and time. Use "Dashcam Viewer" for playback and visualization.
• Speed Unit: Select between KMH and MPH.
• GPS Info Stamp: Imprint GPS information on recorded video.
• Camera Model Stamp: Imprint the camera model on recorded video.
• Frequency: Adjust to minimize flickering and banding in video.
• Format microSD Card: Deletes all data on the card. Back up important files before formatting.
• Reset Camera Setting: Resets device settings to default.
• Wi-Fi Name (SSID): Change the Wi-Fi network name.
• Wi-Fi Password: Change the Wi-Fi password.
• Custom Text Stamp: Imprint custom text on recorded video.
• Car License Number: Imprint the car's license plate number.
• Free Space on Card: Displays remaining microSD card storage.

Other

• App Version: Check the current version of the VIOFO app.
• Firmware: Check the current firmware version of the camera.

Firmware Upgrade

Follow instructions on the website to upgrade firmware: https://support.viofo.com/support/solutions/19000101567

ℹ️ Note: Format the microSD card in the camera before upgrading for stable operation. Do not unplug or power off the camera during the upgrade process, as it may prevent the camera from booting.

Notice

FCC Statement

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio / TV technician for help.

Caution

Any changes or modifications to this device not explicitly approved by the manufacturer could void your authority to operate this equipment. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference. (2) This device must accept any interference received, including interference that may cause undesired operation.

Shenzhen VIOFO Technology Co., Ltd, declares that this Radio Frequency peripheral is in compliance with the essential requirements and other relevant provisions of Directive 1999/5/EC.

Customer Service

Thank you for choosing VIOFO! All products are warranted for 12 months from the date of purchase, and accessories for 3 months. VIOFO offers lifetime technical support. We are committed to ensuring 100% customer satisfaction.

Product Registration Program

Register your new product at www.viofo.com to extend your warranty by 6 months, from 12 to 18 months.

Your Opinion Matters

Share your thoughts or feedback with VIOFO at support@viofo.com.

Video Sharing

Share your VIOFO camera footage with us. For a chance to receive a mysterious gift, email your videos to marketing@viofo.com.

How to Contact Us

• Submit a ticket at: support.viofo.com
• Live chat: www.viofo.com
• Email: support@viofo.com
• Facebook: www.facebook.com/viofo.world
• Phone (CN): +86 755 8526 8909 (Mon-Fri 9am-6pm)