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. 5 Lens Ocular System Magenta Coated Optics Bak7 Prisms Light Weight Design SwiftReliant Five Year Warranty Close-focusing roof prism. 5-lens ocular system. Focuses as close as 11.5 ft.. Includes sheath-type case, belt loop, and neck strap .