Amazing VersatilityThe VPA variable phone adapter connects your smartphone to SWAROVSKI OPTIK binoculars and spotting scopes so that you can take extraordinary photos and videos to keep and share.AR-B adapter ring for binoculars/BTXThe AR-B adapter ring is designed for use with binocular systems from SWAROVSKI OPTIK. It is easy to fit and connects your CL Companion, EL, EL Range, or SLC binoculars or your BTX spotting scope to your smartphone.