bokilino A399+X55 Adjustable Car Cup Holder Phone Mount

Product Overview

The bokilino A399+X55 is an adjustable smartphone mount designed to install inside a vehicle cup holder rather than attach to a windshield, dashboard, or air vent. Its expanding base fits into compatible cup holders and uses three outward-moving supports with non-slip contact surfaces to stabilize the mount. The base can be adjusted to accommodate cup holders measuring approximately 2.5 to 4.1 inches across.

An articulated neck extends the phone cradle above the cup holder. The arm can reach up to approximately 11 inches in height and provides 270-degree positional adjustment, while the cradle uses a ball joint for 360-degree rotation. This allows a phone to be positioned in portrait or landscape orientation.

The spring-loaded cradle is designed for smartphones measuring approximately 4 to 7 inches and can accommodate many devices fitted with protective cases. A rear release button opens the holding arms for one-handed insertion or removal. The A399+X55 does not require adhesives or suction mounting. It is intended for use in compatible automobiles, trucks, golf carts, and other equipment with suitably sized cup holders.

Product Information

Identification

Physical

Product Identifier Summary

• Model Number: The model number identifies this specific bokilino cup-holder mount configuration and helps distinguish it from other visually similar phone mounts.
• MPN: A manufacturer part number identifies a particular commercial configuration for cataloging, inventory, service, and replacement purposes.
• UPC: The Universal Product Code is a 12-digit barcode identifier commonly used in North American retail and inventory systems.
• EAN: An EAN is an international trade-item identifier commonly represented by a 13-digit barcode. A separately verified EAN was not established for this configuration.
• GTIN: A Global Trade Item Number is part of the international product-identification system. The verified UPC for this product functions as its GTIN-12.
• ASIN: An ASIN identifies a specific catalog record within an online product database. It is separate from the manufacturer-assigned model designation.
• ISBN: An International Standard Book Number is used for books and certain publishing products and does not apply to an automotive phone mount.

Common Uses

The A399+X55 is intended to hold a smartphone within view while using a compatible vehicle cup holder as the mounting point. Its adjustable arm allows the screen position to be changed without attaching hardware directly to the dashboard or windshield.

• Displaying navigation applications while driving
• Positioning a phone for hands-free calling where legally permitted
• Viewing audio or media controls
• Holding a smartphone in cars, SUVs, and trucks
• Use in golf carts with compatible cup holders
• Holding certain GPS devices within the supported size range
• Use in stationary equipment or furniture with suitably sized cup holders

Maintenance and Care

The mount contains adjustable joints, a mechanical expanding base, and a spring-loaded phone cradle. Routine care should focus on keeping these moving parts free from debris and ensuring that the contact surfaces remain clean.

• Remove dust and debris with a soft dry or lightly dampened cloth.
• Keep the expanding base free from grit that could interfere with adjustment.
• Inspect the silicone contact surfaces periodically for wear or contamination.
• Check the articulated arm and ball joint if the cradle begins to move unexpectedly.
• Do not use excessive force when tightening the base inside a cup holder.
• Avoid solvents or harsh cleaners that could damage plastic or rubber components.
• Remove the mount before cleaning the vehicle cup holder with liquids.
• Store the holder away from excessive heat when it is not installed for long periods.

Safety Information

• Install the mount only where it does not interfere with steering, gear selection, vehicle controls, airbags, or driver visibility.
• Adjust the phone position before driving rather than making substantial adjustments while the vehicle is moving.
• Confirm that the expanding base is secure before placing a phone in the cradle.
• Check that the phone is firmly held by the cradle before vehicle movement.
• Do not place a device in the holder if its size or case prevents the arms from securing it correctly.
• Follow applicable local laws concerning handheld devices, navigation screens, and phone use while driving.
• Do not allow the mounting arm to obstruct controls or create a hazard during sudden braking.
• Recheck the mount after driving over rough surfaces or after significant temperature changes.

Technical Specifications

Product History

The A399+X55 is part of bokilino’s range of cup-holder-mounted smartphone holders. The model uses an expandable base and adjustable arm rather than the gooseneck design found on some earlier bokilino cup-holder mounts.

Public catalog information identifies this configuration as an upgraded version with a longer articulated arm and a wider adjustable base. Related bokilino products include traditional flexible gooseneck mounts and newer two-in-one cup-holder expanders. A formally documented direct successor model was not established.

Key Features

• An expandable base allows installation without dashboard adhesive or windshield suction.
• Three outward-moving supports create contact with the inside of a compatible cup holder.
• Non-slip surfaces increase friction between the base and cup holder.
• An articulated arm allows both height and angle adjustment.
• A ball-joint cradle supports portrait and landscape positioning.
• The adjustable phone clamp accommodates a broad range of smartphone sizes.
• A rear release button allows the cradle arms to open for phone removal.
• The holder can accommodate many phones while they remain inside protective cases.

Package Contents

• bokilino A399+X55 adjustable cup-holder base
• Universal smartphone cradle
• User documentation

Compatibility

The A399+X55 is designed for smartphones approximately 4 to 7 inches in screen size, including many models from Apple, Samsung, Google, LG, and other manufacturers. Compatibility depends on the overall device and case dimensions rather than the phone brand alone.

The vehicle cup holder must also fall within the adjustment range of the expanding base. Unusually narrow, wide, shallow, angled, or irregularly shaped cup holders may not provide adequate support even when their nominal diameter appears suitable.

Frequently Asked Questions

What is the correct model number for this bokilino phone holder?

The verified model designation is A399+X55. This designation is also used as the manufacturer part number for the configuration associated with the product identifier.

How does the mount attach to a vehicle?

The base is inserted into a compatible cup holder and expanded outward until its contact points grip the inside surface. It does not rely on adhesive, suction, or an air-vent clip.

Will it fit every vehicle cup holder?

No. Cup holders vary in diameter, depth, taper, and shape. The mount requires a cup holder that allows the expanding base to make stable contact within its documented adjustment range.

Can the phone be rotated horizontally?

Yes. The cradle uses a rotating joint that permits portrait or landscape positioning.

Can the arm position be changed?

Yes. The articulated arm provides a broad range of angular adjustment so the screen can be moved closer to the driver’s preferred viewing position.

Does it work with large smartphones?

The cradle is documented for phones approximately 4 to 7 inches in size. Overall width and case thickness should still be checked because unusually bulky accessories can affect the clamp fit.

Can a phone remain in its case?

Many conventional protective cases can remain installed. Very thick cases, wallet cases, or accessories attached to the back of the phone can change the dimensions enough to affect compatibility.

Does the mount require tools?

Normal cup-holder installation does not require permanent vehicle modification. The expanding base is adjusted mechanically to secure the holder in place.

Does it block an air vent?

The mount installs in a cup holder rather than directly on an air vent. Whether the final phone position obstructs a vent depends on the vehicle interior and how the arm is adjusted.

Does it leave adhesive residue?

No adhesive is required for the documented installation method, so the mount does not depend on a sticky dashboard pad.

Can it hold a GPS device?

Some GPS devices can fit if their external dimensions fall within the cradle’s adjustment range. Compatibility should be determined from the device’s actual dimensions and weight.

Can this holder be used outside a car?

The expanding base can physically fit other appropriately sized cup holders, such as those found in some golf carts, exercise equipment, or furniture. Stability should be checked before placing a device in the cradle.

What should be done if the mount becomes loose?

Remove the phone, check that the base is properly seated, and readjust the expanding supports. Dirt, an irregular cup-holder shape, or insufficient tightening can reduce stability.

What warranty applies?

Public product information identifies a one-year warranty for this model. Applicable exclusions, eligibility requirements, and service procedures should be checked in the documentation supplied with the individual unit.

Buying Considerations

Cup-holder mounts avoid adhesive and windshield attachment, but they occupy a cup holder and place the phone lower in the vehicle than some dashboard mounts. Vehicle interior layout therefore has a significant effect on usability.

• Measure the intended cup holder before relying on the published adjustment range.
• Check whether the mount would interfere with the gear selector or nearby controls.
• Consider whether using the cup holder for the mount leaves sufficient beverage storage elsewhere.
• Confirm that the phone and protective case fit within the cradle.
• Position the arm so the screen does not obstruct the driver’s view of the road.
• Consider vehicle vibration and road conditions when evaluating stability.
• Verify the A399+X55 model number when comparing replacement parts or similar bokilino mounts.
• Check local laws governing smartphone display placement and hands-free operation.

Customer Feedback Summary

This section summarizes recurring themes in publicly available customer feedback. These observations are generalized user experiences rather than verified engineering specifications, laboratory test results, or guarantees of individual performance.

Positive feedback commonly focuses on the stable cup-holder installation, adjustable arm, and ability to position a phone without attaching adhesive to the dashboard. Users also frequently mention compatibility with larger smartphones and protective cases as useful in everyday vehicle use.

Reported limitations are often related to differences among vehicle interiors. Some users find that the holder occupies a cup holder they would otherwise use for drinks, while others report that certain cup-holder shapes require repeated adjustment to maintain a tight fit. An extended arm can also transmit more movement when driving over uneven roads.

Individual experience with the cradle varies according to phone size, case thickness, vehicle vibration, and how firmly the base is installed. These observations should not be treated as evidence that the holder will fit every vehicle or smartphone configuration.

Related Products

bokilino offers several related smartphone mounts that use cup holders as their primary attachment point. Designs vary in arm style, base dimensions, and whether additional cup storage is incorporated.

• bokilino Universal Adjustable Gooseneck Cup Holder Phone Mount
• bokilino 2-in-1 Cup Holder Phone Mount with Cup Expander
• bokilino Long-Arm Cup Holder Smartphone Mount
• Other bokilino universal phone and GPS holders

Related models can appear visually similar while using different bases, arms, and cradle assemblies. Model designation and physical measurements should therefore be checked before assuming that components are interchangeable.

Last Updated

August 16, 2026