Optics compatibility Compliable with Binocular, monocular, telescope, microscope, spotting scope, night vision and most optical device. Fit eyepiece diameter 28mm-47mm. Not fit 2inch eyepieces. | Universal Smartphone compatibility Universal: With super large width range: 2.13"-3.54"(54-90mm), Compatible with phone 13Pro Max, 13 Pro, 13, 12Pro Max, 12 Pro, 12, 12mini, 11Pro Max, 11 Pro,11, SE, Xs,Xr, X, 8 plus, 8, 7plus,7, 6plus, 6,5s,5, 4s, Samsung M30,S21,S21+, S20, S20+,S20FE, S10, S10+, S10E, S8, S7, S6, S5, S4, Note20, Note20 Ultra, Note,A31,A51,A71,A70, LG, HTV, Sony, and much more. | Not for riflescopes Not work on a rifle scope because the phone camera is too close to the eyepiece. |