WALI M12XXL
WALI Stacked Monitor Mount (M12XXL) Instruction Manual
Model: M12XXL
Introduction
Thank you for choosing the WALI Stacked Monitor Mount (M12XXL). This manual provides essential information for the safe and efficient installation, operation, and maintenance of your dual monitor stand. Please read these instructions carefully before installation and retain them for future reference.
This dual vertical stacked mount is designed to fit most screens up to 32 inches, supporting up to 22 lbs per arm, with mounting holes of 75x75mm or 100x100mm (VESA compatible). It features an extra tall 39-inch pole for ample adjustment space and offers multiple adjustments including tilt, swivel, and 360-degree rotation for optimal ergonomic positioning.
Safety Information
WARNING: Failure to read and follow all instructions may result in personal injury or damage to the product. Keep this manual in a safe place for future reference.
- Ensure the mounting surface can safely support the combined weight of the equipment and all attached hardware.
- Do not exceed the maximum weight capacity of 22 lbs per monitor.
- Use only the components provided by the manufacturer.
- If you have any questions, contact WALI customer support.
Package Contents
Verify all components are present and undamaged before beginning installation. If any parts are missing or defective, please contact WALI customer support.
- 1 x WALI Dual Monitor Mount (M12XXL)
- Mounting Hardware Kit (various screws, washers, spacers)
- User Manual

Video Description: This video displays the complete package contents of the MOUNTUP Vertical Dual Monitor Mount MU6012A, which is similar in components to the WALI M12XXL. It shows all parts laid out on a wooden surface, including the main pole, monitor arms, VESA plates, desk clamp, grommet base, and hardware bags. This helps users identify and verify all included items before starting assembly.
Setup and Installation
The WALI M12XXL monitor mount offers two installation methods: C-Clamp Mounting and Grommet Mounting. Choose the method best suited for your desk.
1. Assemble the Pole
Connect the two sections of the pole and secure them using the provided screws and Allen wrench.
2. Choose Mounting Type
Option A: C-Clamp Installation
- Attach the C-clamp base to the bottom of the pole.
- Position the clamp on the edge of your desk and tighten the knob until secure. Ensure your desk thickness is between 0.2 and 3.62 inches.
Option B: Grommet Base Installation
- If your desk has a grommet hole, attach the grommet base to the bottom of the pole.
- Insert the pole through the grommet hole and secure it from underneath the desk using the provided hardware. This option fits desk thicknesses up to 2.56 inches.

3. Attach VESA Plates to Monitors
- Carefully place your monitor face down on a soft, clean surface.
- Align the VESA plate with the mounting holes on the back of your monitor (75x75mm or 100x100mm).
- Secure the plate using the appropriate screws and washers from the hardware kit.
4. Mount Monitors to Arms
- Slide the monitor arms onto the pole at your desired height.
- Tighten the set screws on the arms to secure them in place.
- Carefully lift each monitor and slide the VESA plate onto the monitor arm's mounting head.
- Secure the monitor to the arm using the provided locking mechanism.

Video Description: This video demonstrates the installation process of a vertical dual monitor mount, including attaching the base to the desk, assembling the pole, and mounting the monitor arms. It shows how to secure the arms and monitors, and how to manage cables for a clean setup. This video is relevant for understanding the physical installation steps.
5. Cable Management
- Utilize the detachable cable clips on the pole and arms to route your power and AV cords neatly.
- This helps maintain an organized workspace and prevents cable clutter.

Operating and Adjustments
The WALI M12XXL monitor mount offers flexible adjustments to achieve optimal viewing angles and ergonomic comfort.
- Height Adjustment: Loosen the set screw on the monitor arm clamp, adjust the arm to the desired height along the 39-inch pole, and then re-tighten the screw.
- Tilt: The monitor arms allow for +/-90 degree tilt. Adjust the monitor vertically to reduce glare and optimize viewing.
- Swivel: Swivel the monitor +/-90 degrees horizontally to share your screen or change your viewing perspective.
- Rotation: Rotate the monitor 360 degrees to switch between landscape and portrait modes as needed.

Specifications
| Feature | Detail |
|---|---|
| Model | M12XXL |
| Screen Size Compatibility | Up to 32 inches |
| Weight Capacity | 22 lbs per monitor |
| VESA Compatibility | 75x75mm, 100x100mm |
| Pole Height | 39 inches |
| Tilt Angle | +/-90 degrees |
| Swivel Angle | +/-90 degrees |
| Rotation | 360 degrees |
| Mounting Type | C-Clamp (0.2-3.62" desk thickness), Grommet (up to 2.56" desk thickness) |
| Material | Metal |
| Color | Black |
| Item Weight | 10.58 pounds |
| Product Dimensions | 15.86 x 7.24 x 4.17 inches |
Maintenance
- Periodically check that all screws and connections are tight and secure.
- Clean the mount with a soft, dry cloth. Avoid abrasive cleaners.
- Ensure cables are not pinched or strained during adjustments.
Troubleshooting
- Monitor Sagging: Ensure all tilt and height adjustment screws are sufficiently tightened. For tilt, some users find it necessary to "really crank down" the screws to prevent sag over time.
- Instability: Verify that the desk clamp or grommet base is securely fastened to a stable desk surface.
- Limited Movement: Check for any obstructions or cables preventing full range of motion. Ensure adjustment screws are loosened before attempting to move the arms.
- Missing Parts: Refer to the "Package Contents" section. If any parts are missing, contact WALI customer support.
Warranty and Support
WALI provides experienced and friendly US-based customer support available to assist 7 days a week. For any questions or issues, please refer to the contact information provided in your product packaging or visit the official WALI website.
Protection plans are available for purchase separately to extend coverage beyond the standard warranty. Please check Amazon for details on 2-Year and 3-Year Protection Plans.
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