4–12.9IN • 750MM ARM • 52MM CLAMPUGREEN 50394 Long-Arm Clamp Tablet & Phone Holder
Overview
UGREEN 50394 clamps to a suitable desk, table or strong headboard and positions a compatible phone or tablet on an articulated spring arm. two-stage spring arm with about 750mm total reach, official regional UGREEN 180° and 135° arm-joint movement, plus a 360° device-head joint. The verified construction is sturdy steel spring arms, adjustable composite cradle, threaded metal clamp hardware and soft contact pads. This guide explains exact fit, setup, stability and safety boundaries so the product is easy to choose and use responsibly.
SKU 50394Long-Arm Clamp HolderBlackPassive holder
Key features
Exact holder type
Long-Arm Clamp Holder. clamps to a suitable desk, table or strong headboard and positions a compatible phone or tablet on an articulated spring arm.
Fit boundary
devices from approximately 4 to 12.9 inches; the exact cradle artwork shows an adjustable holding span of approximately 112–225mm.
Adjustment
two-stage spring arm with about 750mm total reach, official regional UGREEN 180° and 135° arm-joint movement, plus a 360° device-head joint.
Mounting method
tool-free screw clamp for a strong, flat edge up to approximately 52mm / 2in thick; protective pads reduce direct contact but do not make every surface suitable.
Measure before ordering
Phone and tablet names are only examples. Physical compatibility is controlled by screen and body size, total thickness, weight, case shape, camera bump, accessories and the way the device meets the support points.
Measure the complete setup
devices from approximately 4 to 12.9 inches; the exact cradle artwork shows an adjustable holding span of approximately 112–225mm. Screen size alone does not describe case thickness, camera bump, grip accessories or total weight.
Check the support points
Both lower hooks and the padded back surface must contact the device securely. Remove a wallet, ring, battery case or pop-out grip if it interferes.
Choose a stable position
Keep the clamp close to a strong supporting corner, tighten it evenly and form a compact arm geometry. A fully extended horizontal arm creates more leverage and movement.
Test before normal use
Gently tap the screen and check every hinge, clamp, base, adhesive bond or vent clip. Stop if the device creeps, tips, releases or makes the mounting surface flex.
Adjustment and viewing guide
Verified mechanism: two-stage spring arm with about 750mm total reach, official regional UGREEN 180° and 135° arm-joint movement, plus a 360° device-head joint.
Adjust unloaded whenever practical. Support the device with one hand, move the mechanism with the other and stop at its natural limit. A firm hinge is normal; forcing it can damage the joint or make the base slip.
Stability principle: raising, extending or moving a device forward increases leverage. Heavier devices should stay lower, closer to the base or clamp, and slightly tilted back.
Use scenarios
Bedside viewing
Mount to a strong side surface and position the device beside—not above—the user.
Desk reference
Bring a tablet closer while preserving work-surface space.
Overhead demonstrations
Use for recipes, crafts or product views only after testing the clamp and keeping the device away from people and breakables.
Sofa or reading setup
Adjust reach for comfortable viewing while maintaining a compact, stable arm shape.
Setup and usability guidance
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Step 1: Choose a strong, flat mounting edge within the 52mm limit and protect delicate finishes if necessary.
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Step 2: Seat the clamp squarely and tighten it until stable; do not crush hollow, glass, veneered or fragile furniture.
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Step 3: Set a compact arm position before installing the device.
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Step 4: Open the cradle, centre the device within the 112–225mm span and confirm every corner support is engaged.
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Step 5: Adjust joints with two hands, keeping fingers clear of springs and hinge pinch points.
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Step 6: Route any cable through the opening with slack, then test movement before hands-free use.
Best practice: Keep the clamp close to a strong supporting corner, tighten it evenly and form a compact arm geometry. A fully extended horizontal arm creates more leverage and movement.
Mounting surface, stability and environment
Exact mounting method: tool-free screw clamp for a strong, flat edge up to approximately 52mm / 2in thick; protective pads reduce direct contact but do not make every surface suitable.
Flat and clean contact
Dust, oil, grit and moisture reduce friction and can scratch surfaces. Clean and dry every contact area before installation.
Keep away from edges
Position the loaded device where a slip or release will not send it onto a person, floor, sink, cooker, keyboard or glass object.
Touch gently
Use lighter taps or support the device for typing, drawing and gaming. A holder designed for viewing is not always a rigid typing platform.
Recheck regularly
Temperature, vibration, repeated adjustment and normal wear can change grip. Inspect the mount, pads and device position before each important use.
Compatible devices and systems
Verified physical class: devices from approximately 4 to 12.9 inches; the exact cradle artwork shows an adjustable holding span of approximately 112–225mm.
Apple devices
Compatible iPhone or iPad examples may fit only when their complete size, weight and case remain within the stated physical limits.
Android devices
Samsung Galaxy, Google Pixel, OnePlus, Xiaomi, Redmi, realme and other phones/tablets are assessed by measurements—not brand alone.
E-readers and handhelds
A Kindle, e-reader, Switch or similar device may fit only if all support points engage and the complete device stays inside every size and load limit.
Case caveat
A protective case can increase thickness, move the centre of gravity and cover the charging opening. Measure it installed, not separately.
What this product does
- Clamps to a suitable desk, table or strong headboard and positions a compatible phone or tablet on an articulated spring arm.
- Uses the documented long-arm clamp holder mechanism for hands-free physical support.
- Provides the verified adjustment: two-stage spring arm with about 750mm total reach, official regional UGREEN 180° and 135° arm-joint movement, plus a 360° device-head joint.
- Uses the verified mounting method: tool-free screw clamp for a strong, flat edge up to approximately 52mm / 2in thick; protective pads reduce direct contact but do not make every surface suitable.
- Protects covered contact areas with the specified silicone, rubber or soft pads; these reduce—not eliminate—the possibility of marks.
What this product does not do
- not a floor stand, wall fastener or zero-vibration camera rig; long-arm movement can occur after touch, and the device must never be placed directly above a person.
- It does not include MagSafe, wireless charging, a battery, powered USB port or motor unless explicitly stated—which this SKU does not.
- It does not make every phone case, tablet, furniture edge, wall finish, air vent or vehicle compatible.
- It does not guarantee zero wobble during touch, typing, drawing, rough roads or fully extended use.
- It is not safety equipment and should not suspend a device where release could cause injury or serious damage.
What to do
Measure first
Check the complete device and case against every stated size, thickness, opening and load limit.
Adjust with two hands
Support the device or unload the holder before moving a firm hinge, rail, spring arm, clamp or rotating base.
Route cables safely
Leave slack at the connector, avoid sharp bends and keep cables away from hinges, springs, vehicle controls and walking paths.
Inspect the setup
Check screws, pads, clips, clamps, adhesive edges and device seating before use and after relocation or temperature change.
What not to do
Do not exceed limits
Do not guess load capacity, case fit, clamp thickness, vent compatibility or adhesive reuse beyond the exact values stated here.
Do not force movement
Stop when a hinge, clamp or rail reaches its natural limit. Do not use tools for extra leverage unless the supplied assembly step requires them.
Do not use near hazards
Avoid flames, hot cookware, wet areas, unstable shelves, traffic controls and positions directly above people or breakables.
Do not trust a partial grip
Both device and mount must be fully seated. A phone caught by one hook, a clamp on a rounded edge or a clip halfway onto a vent is unsafe.
Warnings and limitations
Overhead safety: never position a phone or tablet directly above a face, child, pet, keyboard, glass item or other breakable object. Check the clamp before every use.
Pinch points: keep fingers, hair, cables and loose clothing clear of hinges, springs, telescopic rails and clamp mechanisms.
Heat and moisture: keep the holder and device away from flames, hot cookware, direct heaters, steam, sinks, rain and pooled liquid.
Children and pets: this is not a toy. Keep small hardware and loaded devices out of reach and avoid trailing cables.
Inspection: stop using the product if a hinge loosens, pad detaches, plastic cracks, metal bends, adhesive lifts, clamp slips or vent blade deforms.
Technical specifications
| Brand / SKU |
UGREEN 50394 |
| Model / type |
Long-Arm Clamp Holder |
| Colour |
Black |
| Primary use |
clamps to a suitable desk, table or strong headboard and positions a compatible phone or tablet on an articulated spring arm |
| Device fit |
devices from approximately 4 to 12.9 inches; the exact cradle artwork shows an adjustable holding span of approximately 112–225mm |
| Adjustment |
two-stage spring arm with about 750mm total reach, official regional UGREEN 180° and 135° arm-joint movement, plus a 360° device-head joint |
| Mounting method |
tool-free screw clamp for a strong, flat edge up to approximately 52mm / 2in thick; protective pads reduce direct contact but do not make every surface suitable |
| Materials |
sturdy steel spring arms, adjustable composite cradle, threaded metal clamp hardware and soft contact pads |
| Supported screen range |
Approximately 4–12.9in |
| Cradle opening shown |
Approximately 112–225mm / 4.4–8.8in |
| Total arm length stated by UGREEN |
Approximately 750mm |
| Maximum mounting thickness |
Approximately 52mm / 2in |
| Head rotation |
360° |
| Arm joints stated by UGREEN |
Approximately 180° and 135° |
| Charging / electronics |
None; passive mechanical holder |
| Package contents |
1 × UGREEN 50394 articulated holder assembly with base clamp and adjustable device cradle |
Package contents
Exact-SKU reconciliation: Official UGREEN regional information confirms SKU 50394, 4–12.9-inch fit, 750mm two-stage arm and 2-inch clamp. Exact India media shows a 52mm clamp and 112–225mm cradle. The older India text’s ~4.7cm clamp figure was rejected.
Primary sources: exact live UGREEN India product record and images for SKU 50394 plus official regional UGREEN exact-SKU material.
Image policy: only the exact live product images listed in this draft are used. Generic family claims that conflict with dimensions, mechanism or fit are excluded.
Troubleshooting
Device tips forward
Lower the height or arm, tilt the device back, centre it over the support and remove a heavy case/accessory. Stop if the stated fit or load limit is exceeded.
Holder slides or rotates
Unload it, clean and dry contact pads, retighten only as instructed and move to a firmer, flatter mounting point.
Case will not sit fully
Measure total thickness and width. Remove a wallet, grip, battery or rugged case rather than forcing the device into shallow hooks.
Cable does not fit
Try a slimmer compatible connector and route it without tension. The access opening does not guarantee every plug shape or port location.
Hinge feels too firm
Unload the stand and move the joint slowly with two hands. Do not apply oil, heat or extra tools; stop if the housing separates or metal bends.
Mounting surface looks marked
Remove the device immediately. Do not keep tightening or loading the mount; follow the furniture, wall or vehicle manufacturer’s care guidance.
Product-specific FAQ
What is UGREEN 50394 designed to do?
It clamps to a suitable desk, table or strong headboard and positions a compatible phone or tablet on an articulated spring arm. It is a passive mechanical holder, not a powered accessory.
Which phones or tablets fit?
devices from approximately 4 to 12.9 inches; the exact cradle artwork shows an adjustable holding span of approximately 112–225mm. Measure the complete device with its normal case and accessories before ordering.
Can I use a protective case?
Often yes when the combined device and case remain within every stated size, thickness, weight and cradle limit. Thick rugged, wallet, battery, keyboard and grip cases may need removal.
Does it charge the device?
No. The holder contains no charging electronics, battery or power supply. Any charging opening only provides space for a separate compatible cable, charger and socket.
Does it use MagSafe or magnets?
No magnetic attachment is claimed for this SKU. The device is supported mechanically by its cradle, clamp, base, adhesive shelf or vent-mounted structure as described above.
Can I use it in portrait and landscape?
Yes, within the stated fit limits. Reposition or rotate the device only after supporting it with one hand and checking the mount.
Will it stay completely still when I touch the screen?
No freestanding, articulated, adhesive, clamp or vent holder can guarantee zero movement. Use a lower, centred position and support the device during firm typing, drawing or repeated tapping.
What surface or mounting point should I use?
tool-free screw clamp for a strong, flat edge up to approximately 52mm / 2in thick; protective pads reduce direct contact but do not make every surface suitable. Avoid fragile, dirty, wet, textured, loose or heat-damaged surfaces.
What should I avoid?
not a floor stand, wall fastener or zero-vibration camera rig; long-arm movement can occur after touch, and the device must never be placed directly above a person. Do not exceed stated dimensions or place the loaded holder where a fall could injure someone or damage another object.
How should I clean it?
Remove the device first. Wipe hard surfaces with a soft, slightly damp cloth, then dry completely. Do not soak hinges, springs, adhesive, clamp pads or vent clips and do not use solvents or abrasives.
What is included?
1 × UGREEN 50394 articulated holder assembly with base clamp and adjustable device cradle.
Exact-model check before ordering
Match UGREEN SKU 50394, the long-arm clamp holder, its fit boundary, mounting method and adjustment mechanism. Similar UGREEN holders can use different hinges, clamp spans, device limits, adhesives or vehicle fittings.
SKU 503944–12.9IN • 750MM ARM • 52MM CLAMPNo built-in charging
