SmallRig's 2791 Universal Smartphone Cage is compatible with most mobile phones between 62mm and 86mm wide, with or without a case. However, it is not specifically stated that it is compatible with the iPhone 16 Pro Max or 17 Pro Max, which are generally wider. For these models, SmallRig offers dedicated cages designed specifically for the iPhone 16 Pro Max, offering a precise fit and tailored features.

This universal cage can be mounted on a tripod thanks to its multiple 1/4"-20 threaded holes, allowing you to attach tripods and other video accessories such as microphones or lighting. It also has two cold shoe brackets for adding additional equipment.

In short, for an iPhone 16 Pro Max or 17 Pro Max, it is preferable to use a dedicated cage designed for these models. The 2791 universal cage can be mounted on a tripod, but its compatibility with these specific models is not guaranteed.