7X and 8X wide field binoculars are the recommended strength for bird watching, 9X and 10X for more general observation.
(7X and 8X wide field binoculars; are; the recommended strength for bird watching, 9X and 10X for more general observation)
7X and 8X wide field binoculars
are
the recommended strength for bird watching, 9X and 10X for more general observation