Feature rich 2.5v Pocket Ophthalmoscope provides all of the features, none of the bulk.
5 aperture selections (small spot, large spot, semicircle, fixed and red-free filter). 19 viewing lenses from -20 to +20 diopters for better resolution. Illuminated magnified lens dial. Rubber brow rest
Ophthalmoscope in hard case measures 7 1/4" x 4 1/2" x 1 1/2", weighs.82 lbs
"AA" battery handle (batteries included) with on/off power switch integrated into pocket clip
2.5v Ad LED lamp for true tissue color
Ophthalmoscope meets or exceeds ISO 10942, ISO 15004-1, and ISO 15004-2