A closer lookMonitor arms
Two screens. One adjustable workstation.
Ergotron LX Dual Side-by-Side Arm
45-245-224 · matte black
Buyer feedback ↓A dual-arm desk mount that lets you position two compatible monitors independently.
- 2 monitorsMountingIndependent adjustable arms
- 7–20 lb eachMonitor weight rangeWeight without the original stand≈ 0.84–2.4 gallons of water
- 75 / 100 mmVESA patternsCheck the monitor mounting holes
Amazon US · 45-245-224 · matte black · Retailer link
THE QUICK TAKE
Is it right for you?
The LX dual arm is useful if you want two screens at a comfortable height without two desk stands. Each arm can move independently, and the cable routing helps keep the back of the desk organized. It is a practical upgrade when you adjust the screens often.
Do not buy on screen size alone: monitor weight, VESA fit and desk strength all matter. A screen that is too light can be as unsuitable as one that is too heavy. The arms also need room to move, and a thin or fragile desktop may need a different mounting plan.
01 / BUYING NOTES
Before you buy.
Check the back of each screen.
Match the VESA pattern and monitor weight before installation. Remove the original stand when checking the supported load.
Leave room for the arms to move.
The elbows extend behind the screens. Allow clearance from the wall and adjust the spring tension for each monitor.
Route cables with enough slack.
Follow the arm’s cable path while leaving room at the joints. Move the screen through its range before tightening the cable arrangement.
Product specifications and care ↗ · Exact Amazon listing ↗ · Ergotron Installation Guide · Manufacturer manual · LX Dual Side-by-Side Arm ↗
02 / AMAZON REVIEWS
The buyers’ view.
Owners of the matte-black dual arm praise stable screen positioning and easy movement once installed, but setup experiences differ. Some describe straightforward assembly; another struggled with tool clearance, mounting screws that were too short for their monitor, and hard-to-reach adjustment screws. Cable routing also gets mixed feedback: buyers like the channels, while an owner found the covers difficult to fit over the cables.
What buyers like
- stability24
- build quality13
- mobility13
- adjustability7
Mixed feedback
- Value for money19
- installation16
- cable management5
Common concerns
- mounting hardware5
The small numbers are review mentions. Topics and sentiment are from Amazon’s customer-review overview.
Amazon US · Checked . Ratings may include other colors and sizes.
View source ↗03 / REVIEWS & VIDEO
See it in use.
See how it works, then read the findings behind the buying advice.
Ergotron LX Side-by-Side Monitor Arm: Top Features & Benefits
Shows the adjustment range and desk layout of this arm family.
Watch on YouTube ↗See how both screens move and share the desk.
Read 2 written sources Product scope is labeled · key findings in bold
The arm supports two monitors with compatible 75 mm or 100 mm VESA mounts. Each screen must also meet the supported weight range, and the clamp or grommet mount needs a suitable desktop.
Ergotron emphasizes the desk and cable routing as part of the installation. The mounting surface must support the whole setup, and cables need slack through the arm’s movement so they are not pulled tight or pinched.
04 / COMPARE
Different priorities.
Choose the tradeoff that fits how you will use it.
Swipe to see every alternative →
THIS GUIDEErgotron LX Dual Side-by-Side Arm45-245-224 · matte black |  ALTERNATIVEHUANUO FlowLift Pro Dual Monitor ArmFlowLift Pro dual-monitor desk mount | |
|---|---|---|
| Amazon price | $324.99 | $44.98 |
| Best for | Frequently adjusting two compatible monitors | A different dual-arm budget and layout |
| Difference | Independent arms and integrated cable routing | Alternative desk-clamp system |
| Tradeoff | Desk and load compatibility need checking | Load range and adjustment feel differ |
| Explore | Read buying guide →Source ↗ | Read buying guide →Amazon source ↗ |
About these everyday comparisons
Approximate comparisons to familiar objects: a bank card’s 3.37-inch long edge, a Letter sheet’s 11-inch long edge, or a US nickel’s 21.21 mm diameter / 5 g weight. Water comparisons exclude the container’s weight. Capacity comparisons describe volume, not exterior size or how food fits. Reference pictures identify the object; use the labeled ratio for the comparison.
05 / PRICE HISTORY
The price over time.
Ergotron LX Dual Side-by-Side Arm · 45-245-224 · matte black · Amazon US
The chart legend identifies Amazon and new-offer prices when available. New offers can include marketplace sellers. Coupons, shipping and size/color selections can change the final price. Blank periods are missing observations, not a zero price.
06 / RELATED FINDS
A useful extra.
For the way you plan to use it.
Bundle loose cable runs behind the desk.
VELCRO ONE-WRAP Cable Ties
Reusable ties can organize excess cable without permanently cinching it.