Opticron Universal Smartphone Mount II Black. The USM-2 Comprises a Mounting Plate with 4 Adjustable Clamps to Hold Your Smartphone Securely Coupled to a Self Centring 3-pin Adjustable Clamp that Fixes Securely Over Your Eyepiece. The USM-2 is Compatible with Mobile Phones Fitted with a Single Front Facing Camera Lens and a Screen Size up to 6 - Subject to the Position of the Camera Lens on the Device. Specifications for Opticron Universal Smartphone Mount II: Manufacturer: Opticron Additional Features: screen size up to 6in 2 year guarantee single front facing camera lens Package Contents: Opticron Universal Smartphone Mount II Phone Carrier USM Foam Pad Strips x 2 Opticron 50218: Universal Smartphone Mount II Black