The suction cup holder was well packaged and delivered quickly. I was looking for a mount that would keep my valuable equipment — whether it's an action camera or a mobile phone — securely in place, even when things get faster. This little marvel from K&F Concept has absolutely convinced me and is now my go-to accessory for all movie adventures, whether in the car, at the window or on a smooth wall unit. Product details: - Product name: K&F Concept 3" suction cup mount with ball head Magic Arm, compatible with 1/4" holes, with center hole, on the car, for action camera Insta360 X5 x4/cellphone/GoPro/DJI osmo Action 5 4. - Brand: K&F Concept. - Dimensions: 10.9 x 7.6 x 6.6 cm. - Weight: 320 grams. - Load capacity: Impressive 20 kg horizontally and 15 kg vertically, suitable for smooth, flat and non-porous surfaces such as glass or bonnets. - Features: Has a 3" suction cup with vacuum adsorption by air pump and quick release. A 360° ball head on the Magic Arm allows you to adjust the optimal shooting angle. Integrated 1/4" threads with positioning holes for accessories. - Compatibility: Comes with an action camera adapter and a cellphone clip, fits most models such as GoPro 13 12 11, Insta360 X4 X5, DJI OSMO Action Pro 5 4. - Materials: High-density plastics and metal components ensure high-quality workmanship and stability. - Box contents: suction cup, magic arm, mobile phone holder, action camera adapter, Allen wrench and user manual. Advantages: - Holds like Pattex (only easier to remove)! The suction power is amazing. Simply press on a smooth surface and pump until the orange mark disappears — and boom, there is nothing moving anymore. This gives me absolute certainty that my equipment is tight. - Versatile jack of all trades: Whether it's an action camera, a smartphone, a small LED light or even a mirrorless camera — everything is attached in no time thanks to the included adapters and the 1/4" thread. I can even pin my light shaper to the door leaf! - Installation for dummies: put on, pump, done. It's that easy. And thanks to the quick-release fastener, it's no rocket science. - Every nook and cranny is in! The ball head and Magic Arm are so flexible that I can really adjust any shooting angle imaginable without anything wobbling. Perfect for dynamic shots in the car - Safety? Is displayed! The small warning line on the pump is brilliant. When it's visible again, I know it's time to repump. I don't have to guess whether the suction power is still sufficient. - Top quality that you can feel: The holder is well made and feels robust. No cheap materials were used there. Disadvantages: - Picky about surfaces: You really need a smooth, clean and non-porous surface. The suction cup does not hold on rough or painted surfaces. Logical, but you have to remember that. - Regular check-ups: For longer operations, you have to check the suction power every few hours and repump it if necessary. A small effort for maximum safety. - Not for heavyweights: The mount is not intended for large, heavy system cameras, although it carries an astonishing amount. And when installed outdoors on a vehicle above 80 km/h, a safety cable is recommended, which is not included. Conclusion: The K&F Concept 3" suction cup mount is an absolute must-have for anyone who wants to film or take pictures flexibly and safely. It is incredibly strong, versatile and easy to use. The high-quality workmanship and the clever safety features make me feel very good. Minor restrictions on surfaces and occasional repumping are absolutely tolerable given the performance offered and the trust it gives me. I am thrilled and this mount will accompany me on many future adventures. Clear purchase recommendation!