Arkon's RV131 RoadVise universal phone clamp post mount fits all smartphones with cases weighing up to 2 pounds and measuring up to 4 inches wide, including Apple iPhone X, iPhone 8 and 8 Plus, iPhone 7 and 7 Plus, iPhone 6S and 6S Plus, iPhone 6 and 6 Plus, Samsung Galaxy Note 8, Note 5, and Note 4, Galaxy S8, S7, and S6, LG 65, G5, and G4, Nexus 6 and Nexus 5, HTC One M9, One M8, and One Max, Nokia Lumia 1520 and 1020, Motorola Moto G and Moto X. This heavy-duty phone mount can be installed on a wheelchair, microphone stand, or other post 18 to 35mm in diameter. The phone holder rotates on the pedestal's swivel ball adapter head for 360-degree positioning of the device. The holder's solid construction provides strength and reliability by featuring a spring-loaded mechanism that expands to hold smartphones up to 4 inches wide. Arkon recommends using the RoadVise Holder with smartphones with skins and ruggedized cases. The RoadVise is designed to use two hands to install and remove your device. This is to make sure your device cannot be accidentally removed while adjusting viewing angle. The low-profile holder keeps rear smartphone cameras free for spontaneous pictures or videos.