Ophthalmoscope With Xenon Halogen Technology Durable and easy to clean Five different apertures OphthalmoscopeElaborate design and high quality. A classic instrument for physician.FeaturesXHL Xenon Halogen Technology usedDurable and easy to clean2 AA batteries used5 different aperturesRange of lenses: -20D to +20D: ±1D, ±2D, ±3D, ±4D, ±6D, ±8D, ±10D, ±15D, ±20D.ApertureLarge spot for normal ...