Diagnostix Portable Ophthalmoscope, 3.5v, Coax, LED

Features:High-performance aspherical condenser lens reduces corneal reflectionFurther reduction provided by utilizing distinct parallel observational and illuminating light beams (Gullstrand's Equation)Ergonomic design and integral thumb rest improves stability and allows one-finger control of all functionsSynthetic rubber brow rest facilitates use with practitioner eyeglassesDust proofMagnified, illuminated aperture viewing windowUniversal bayonet mount for compatibility with other brands of 3.5V power supply handlesAnti-theft locking feature is standardChoose from halogen/xenon or high-performance AdLED illumination89 viewing lenses from -44 to +45 in single step28 aperture/filter combinations for improved diagnostic capabilitySecondary focusing wheel with zero retention for quick correction of ametropias, provides virtually unlimited fine focus or fast focus in lieu of the 89 viewing lensesThe addition of a Karo (grid) aperture that allows for easier transfer of observations to standard Karo (graph) paperC-sized handle with 1400mAh Li-ion batteryCNC machined from solid brass, the handle is chrome plated in black with a ribbed surface for a sure gripAdtronic electronic rheostatic light intensity control provides infinite continuous control and auto-off feature after two minutesTop half of handle unscrews to access wall plug (available in US or Euro fittings)Li-ion battery provides two to three hours continuous use with halogen/xenon lamp, 30 hours use with LED lamp when charged for 24 hoursUp to 1,200 charge cyclesUniversal bayonet mount for compatibility with other brands of 3.5V instrument heads.