Swarovski VPA 2 - Variable Phone AdapterThe Swarovski VPA 2 Variable Phone Adapter generation 2 replaces the original VPA. This adapter REQUIRES one of the three clamp adapters shown to the right. The VPA 2 accommodates larger smart phones and the clamp system provides a more secure attachment. Three clamp adapters are available: the CA S for all standard spotting scope eyepieces, the CA B for all standard size binocular eyepieces including the BTX dual eyepiece, and the CA B CL for CL