Dosvsi Boat Phone Clamp Mount — Marine Rail Phone Holder (18–40mm) with 360° Rotation & Silicone Strap

Durable marine phone mount that clamps to boat rails and bars, rotates 360°, and secures phones with silicone pads plus a reinforced strap.

Keep your smartphone accessible and stable on deck with the Dosvsi Boat Phone Clamp Mount. Built for boating and other outdoor equipment, this holder fastens to round or square rails from 0.7" to 1.58" (18–40 mm) and adjusts to portrait or landscape views. It combines a rotating ball joint with non-slip silicone contact points and a thickened strap to reduce movement and protect your device from shocks and sudden motion.

How does this mount stay secure on different rails and bars?

The clamp base uses an adjustable C-shaped grip that tightens around tubing and handrails within the 18–40 mm range. Rubberized pads line the clamp to increase friction and prevent scratches, while a sturdy screw mechanism holds the clamping pressure steady during motion.

• Fits round or square rails, tubes, handlebars, and poles 0.7"–1.58" (18–40 mm)
• Non-slip silicone pads protect surfaces and improve grip
• Tool-free installation for quick attachment and removal
• Works on boats, bikes, treadmills, golf carts, strollers, and more

Will my phone be protected from slips and bumps while underway?

Yes — the Dosvsi mount protects phones on multiple fronts. The cradle has silicone on the sides and back to prevent sliding, and an added thick silicone strap locks the device in place for extra security during waves or vibrations.

• Side and rear silicone surfaces cushion the phone
• Thickened silicone strap provides extra retention for rough conditions
• Shock-absorbing design reduces the chance of falls
• One-button release lets you remove the phone quickly when needed

Which phones and cases are compatible with this holder?

The holder accommodates a wide range of smartphones and can expand to accept thicker models or devices left in protective cases. Use the bottom feet release to widen the grip for larger or bulkier phones up to roughly 4–7" screen sizes.

• Compatible with iPhone 17/16/15/14/13/12/11 series and earlier models
• Compatible with Samsung Galaxy S/A/Z/Note/Flip families and many Android phones
• Expandable feet fit phones with protective cases or battery packs
• One-button release simplifies device insertion and removal

How easy is setup and where else can I use it besides boats?

Installation is tool-free and designed for fast on/off use — simply open the clamp, position it on the rail, and tighten until secure. Because it grips standard tubing sizes, the mount is versatile for many vehicles and equipment where hands-free phone access is useful.

• Quick clamp attachment with hand-tightening screw — no tools needed
• Suitable for sailboats, powerboats, pontoons, and fishing boats
• Also mounts on treadmills, indoor bikes, golf carts, strollers, wheelchairs, and tractors
• Customer support available for sizing questions and setup guidance

Who is this for: The Dosvsi Boat Phone Clamp Mount is ideal for boaters, anglers, and anyone who needs reliable, hands-free phone access on moving equipment. Choose this mount if you want a compact, rotatable holder that protects your phone with silicone cushioning and a reinforced strap, fits common rail diameters, and installs without tools.