Description
Smart Rail Safety Rail Diagnostic Testing 0mm specula * Pocket Ophthalmoscope Ships From:FL, USA Cane Accessories With 4 Bars Insert N192 0mm specula * Pocket Ophthalmoscope features: 5 aperture selections (small aperture large aperture fixation aperture semicircle aperture and red free filter) * 17 lenses from 20 to +20 diopters for better resolution * Illuminated dial * Silicon coated protection of glass components * Built in lens dust cover * Rubber brow rest prevents scratching of eyeglasses * Ophthalmoscope head made from polymid an impact resistant space age thermoplastic * AA metal battery handle interchanges * The limits are determined either in beats per minute (bpm) as a percentage (%) of your maximum heart rate or as a heart rate reserve (% HRR)