Otoscope features 2.5v halogen light source for true tissue color and long lasting lamp performance; fiber optics for cool, obstruction free light transmission; wide angle, removable 2.5x viewing lens permits instrumentation; sealed system with included insufflator fitting for pneumatic otoscopy. Welch Allyn disposable polypropylene ear specula in 2.5mm and 4.0mm sizes are convenient, safe, and economical. Complete instrument includes insufflator fitting and tube of 5 each 2.5mm and 4.0mm specula. Ophthalmoscope features 2.5v halogen light source for true tissue color and long lasting lamp performance; 5 aperture selections (small aperture, large aperture, fixation aperture, semicircle aperture, and red-free filter); 17 lenses from -20 to +20 diopters for better resolution; illuminated dial; silicon coated protection of glass components. Built-in lens dust cover. Rubber brow rest prevents scratching of eyeglasses. Pocket clip with integral on/off slide switch for ambidextrous use. Otoscope and opthalmoscope head made from polymid - an impact resistant space age thermoplastic. AA metal battery handle interchanges between pocket otoscope and ophthalmoscope. Lifetime Quality Performance Guarantee on optics.