Product name : otoscope and ophthalmoscope gift set Item : CL-EK0003 Detail : Fiberoptics for cool, obstruction free light transmission Otoscope head made from polymid - an impact resistant space age thermoplastic Swivelling viewing window with 2.5x magnification "AA"polycarbonate battery handle interchanges Pocket clip with integral onoff slide switch for ambidextrous use Technical data magnification:2.5x distal dia:2.5mm, 4mm Bulb:2.5V1.6W halogen lamp Batteries:two"AA"batteries or two "AA"NiMH