Just came across an article about a new offering from Pentax - it's a 4X binocular, and you can snap the two halves apart and connect them together to make a 16X telescope, or use them as 2 4X monoculars:
https://gizmodo.com/the-swiss-army-knife-of-binoculars-sadly-contains-no-kn-1844598008
https://gizmodo.com/the-swiss-army-knife-of-binoculars-sadly-contains-no-kn-1844598008