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Overview
The Ergotron LX Desk Dual Direct Arm, MPN 45-489-216, is a white dual-monitor mounting system designed to position two LCD displays side by side. Its articulated arm and shared monitor crossbar allow both screens to move together, while independent monitor pivots provide individual tilt adjustment.
The desk-mounted design helps free up workspace beneath the displays. It is suitable for office desks, professional workstations, and other environments where two monitors need flexible positioning without separate mounting arms.
Monitor Adjustment and Movement
The LX Dual Direct Arm uses Ergotron Constant Force technology to support smooth screen repositioning. Users can move the monitor assembly vertically, forward, and backward while maintaining the side-by-side arrangement.
The arm provides up to 33 cm of vertical adjustment when the combined monitor weight is below 7.7 kg. With a heavier combined load, the available vertical travel may decrease. The arm extends up to 61.7 cm, and each monitor can tilt independently to help achieve a suitable viewing angle.
Both displays support 360-degree rotation for portrait or landscape positioning. Rotation lockout can be used where restricting this movement is necessary.
Display Compatibility
This model is designed for two LCD monitors, typically up to 25 inches each. The maximum individual monitor weight is 5 kg, with a combined monitor weight limit of 9.9 kg.
Each display must use a compatible VESA MIS-D mounting pattern with 75 × 75 mm or 100 × 100 mm mounting holes. Screen size alone does not determine fit: display width, thickness, depth, weight, and the desired screen arrangement also affect compatibility.
Desk Installation and Cable Management
The included two-piece desk clamp attaches to the edge of a suitable work surface. The manufacturer's standard clamp is specified for desk thicknesses from 10 to 60 mm. An alternative grommet mounting arrangement is available for suitable desk openings, using the appropriate mounting hardware.
The arm incorporates cable management to route monitor cables beneath the arm and through the extension. Check cable length and connector clearance before installation, especially when positioning the displays at maximum extension.
Key Features
- Dual-monitor configuration: Supports two displays side by side on a shared articulated arm.
- Independent monitor tilt: Each display can be tilted separately for screen alignment.
- Constant Force technology: Supports smooth adjustment of the monitor assembly.
- Flexible positioning: Offers vertical adjustment, up to 61.7 cm of extension, and 360-degree display rotation.
- Integrated cable management: Routes cables beneath the arm and within the extension.
Applications
The dual-direct configuration is suited to office productivity workstations, software development desks, financial and administrative work areas, technical support stations, and other environments where two screens are used together. The shared crossbar is particularly useful when both monitors need to move as a coordinated pair.
DC Supplies Product Note
Pay particular attention to the combined weight of both displays. The full 33 cm vertical adjustment is specified for a combined monitor weight below 7.7 kg; heavier configurations may have reduced vertical travel even when they remain within the mount's overall 9.9 kg capacity. Also verify the physical width of both monitors to ensure they can sit side by side without unwanted overlap.
Specifications
| Brand | Ergotron |
|---|---|
| Part Number / MPN | 45-489-216 |
| Product Type | Dual-monitor desk mount arm |
| Product Series | LX |
| Model | LX Desk Dual Direct Arm |
| Color | White |
| Mounting Type | Desk mount |
| Supported Displays | 2 LCD monitors |
| Typical Maximum Screen Size | 25 inches per monitor |
| Maximum Individual Monitor Weight | 5 kg |
| Total Monitor Weight Capacity | 9.9 kg |
| Vertical Adjustment | Up to 33 cm with combined monitor weight below 7.7 kg |
| Maximum Arm Extension | 61.7 cm |
| Tilt Adjustment | 13 degrees backward and 17 degrees forward |
| Pan | 360 degrees |
| Display Rotation | 360 degrees, with rotation lockout |
| VESA Compatibility | MIS-D, 75 × 75 mm and 100 × 100 mm |
| Adjustment Technology | Ergotron Constant Force |
| Desk Clamp Compatibility | Desk thickness from 10 to 60 mm |
| Cable Management | Integrated cable routing beneath the arm and through the extension |
| Included Components | LX arm, extension, two-piece desk clamp, dual monitor bow, two monitor pivots, 7-inch pole, and monitor mounting hardware |
| Warranty | 10 years |
| UPC | 698833058208 |
Frequently Asked Questions
Can the Ergotron 45-489-216 support two monitors of different sizes?
The mount supports two displays within its individual and combined weight limits. Different screen sizes may be usable, but monitor width, thickness, mounting compatibility, and the required positioning should be checked before installation.
Can each monitor be adjusted independently?
Each monitor has its own tilt adjustment and supports display rotation. The shared arm and crossbar allow the two-screen assembly to move together.
Will this mount support two 25-inch monitors?
It is designed for monitors typically up to 25 inches. Both displays must also satisfy the weight limits, use compatible VESA mounting holes, and fit within the available width and clearance.
Does the product include a desk clamp?
Yes. The listed package includes a standard two-piece desk clamp, along with the arm, extension, dual monitor bow, two monitor pivots, pole, and monitor mounting hardware.
Can the arm be installed on a sit-stand workstation?
Compatibility depends on the workstation's mounting provisions and the combined monitor weight. Ergotron specifies a reduced maximum individual monitor weight of 2.2 kg when this arm is installed on a WorkFit-T or WorkFit-TL workstation, and a separately ordered grommet mount is required for that attachment.