This close focusing roof prism monocular was especially designed as a handy glass to observe birds at feeding stations. With a 40mm objective and five lens ocular system, it has a field of 288 feet at 1,000 yards and will focus as close as 11.5 ft. Eye relief is 10mm. This can be kept at a spot inside your house in proximity to bird feeders. Complete with a sheath-type case, belt loop, and neck strap. Attractively gift boxed.