The HookUpz adaptor easily connects your iPhone 4/4S/5/5S 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 iPhone 4/4S/5/5S. Then, easily text or e-mail the results to friends and family. 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 note that full sized binoculars refer to most 8x32mm, 8x42mm, 10x42mm, 7x50mm 10x50mm, etc. sized binoculars. The HookUpz adapter will NOT fit smaller, compact sized binoculars. Please see image that lists multiple binocular models that the HookUpz Binocular Adapter will fit and will not fit. "Hook" to your binoculars for hunting, bird watching, law enforcement surveillance and so much more. The HookUpz Full-Sized Binocular Adapter is only compatible with the iPhone 4/4S/5/5S models. It comes included with an iPhone 5/5S adapter case, iPhone 4/4S conversion kit along with the binocular eyepiece adapter. 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. Please contact Carson for additional warranty details.