2.5v PocketScope Portable Diagnostic Set. Comes with 2.5v Ophthalmoscope, 2.5 Otoscope with built-in throat illuminator, adjustable rheostat, two slim metal power handles, powered by standard AA batteries. Includes 4 reusable eartips (2,3,4,5 mm), 9 disposable 4.25mm ear tips, in a soft zipper case.