Otoscope Cum Opthalmoscope Set Fiberoptics for cool, obstruction free light transmission Magnification:2.5x, Distal dia:2.5mm,4mm Bulb: 2.5V 1.6W halogen lamp Batteries: Two "AA" batteries or two "AA" NiMH rechargeable battery (not included) Opthalmoscope : Halogen light for true tissue color and consistent, long-lasting illumination. Apertures: large and small spot, semi-circle, and red-free filter, Correcting lenses range: +in 1D steps |1-4|6|8|10|15|20|0 & -in 1D steps |1-4|6|8|10|15|20 Bulb:2.5V 1.6W Halogen Lamp....
