Welch Allyn 3.5V Streak Retinoscope Ophthalmoscope Diagnostic Set Product Description and Features OPTHALMOSCOPE RETINOSCOPE 2.8X the brightness and superior streak quality versus standard retinoscopes Superior streak quality enables easier and quicker refractions Optional crossed-linear polarizing filter removes 99% of glare from trial lenses External focusing sleeve offers continuous rotation Sealed optics keep dust out and optics clean for a more effective exam Fits all Welch Allyn 3.5 V power sources Halogen HPX (High Pressure Xenon) lamp illumination for true tissue color and long-lasting performance. 28 focusing lenses with a range of -25 to +40 diopters. Filters: cross-linear polarising, red-free and cobalt blue. Apertures: micro-spot, small spot large spot, slit and fixation aperture. Smooth, non-abrasive knurled finished rechargeable Nickel-Cadmium handle that can also be converted for use with standard C-cell batteries DISCLAIMER The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. If so, please not bid on this item unless you are an authorized purchaser. If the item is subject to FDA regulation, I will verify your status as an authorized purchaser of this item before shipping of the item.