The HookUpz adaptor easily connects your Samsung Galaxy S4 to most full sized binoculars. Now you can take pictures or video directly through the eyes of your binoculars using the camera application on your Samsung Galaxy S4. The HookUpz Binocular Adapter comes included with 2 interchangeable rubber rings that allow the adapter to fit most full-sized binoculars that have an outer eyepiece housing diameter between 40mm-44mm.Please see image that lists multiple binocular models that the HookUpz Binocular Adapter will fit. "Hook up" to your binoculars for hunting, bird watching, law enforcement surveillance and so much more. This version of the HookUpz Full-Sized Binocular Adapter is only compatible with the Samsung Galaxy S4 model. Be sure to capture everything nature has to offer with the Carson HookUpz. At Carson, we strive to make sure our customers are 100% satisfied with the quality of our products. We are so confident in our products that we back them with a Limited Lifetime Warranty. Carson will repair or replace your Carson item if it is found to have manufacturing defects in materials or workmanship.