Welch Allyn 3.5V Prestige Desk Set, 3.5V with Lithium Ion Handles. 3.5V Coaxial Ophthalmoscope: • Unique coaxial ophthaloscope allows easy entry into the eye and shadow-free viewing of the retina • Halogen HPX bulb gives 30% more light than halogen for truer tissue colour • 6 apertures: small, medium, large spot, target, slit and cobalt blue • Dioptre range: +40 to -25 • Dust-free optics. 3.5V MacroView Otoscope: • 4.2X magnification • Twice the field of view • Throat illuminator • Adjustable focusing • Insuflation port for pneumatic otoscopy. Supplied with 2 Lithium Ion, rechargeable handles and a universal desk charger.