The Diagnostix 5110N Pocket Diagnostic Set includes an Otoscope and an Ophthalmoscope. The Otoscope features fiber optics for cool, obstruction-free light transmission and a wide angle swivel 2.5x viewing lens. The Ophthalmoscope features 5 aperture selections (small spot, large spot, semicircle, fixed and red-free filter). Choose from 19 viewing lenses from -20 to +20 diopters for optimal resolution. It has a illuminated magnified lens dial, and a rubber brow rest for patient comfort. Each instrument uses 2 in.AAin. batteries. Taking these items on the go is made simple with the included hard case.