American Diagnostic Otoscope/Ophthalmoscope Diagnostic Set Otoscope/Ophthalmoscope set with 2.5v power supply. Knurled reostatic handle. Otoscope features removable 4x viewing lens. Ophthalmoscope with 25 corrective lenses from -20to +20 diopters. Complete in fitted zippered carry case Otoscope head with removable 4x magnifying lens, and insufflator fitting Bayonet head locking mounts for secure connection to the battery handle C cell powered battery handle with rheostatic on/off switch Auto-clavable, polypropylene ear specula in 2.5mm, 3.5mm, and 4.5mm sizes, complete in zippered case with fitted foam insert that is scuff and scratch resistant and cleans easily Adapter to allow use with welch allyn or compatible disposable specula, weighs 20 oz American Diagnostic Otoscope Ophthalmoscope Diagnostic Set 2.5V, Standard, 20 oz Weight Diagnostic set complete in zippered case with fitted foam insert that is scuff and scratch resistant and cleans easily. Ophthalmoscope head with lens wheel features 25 corrective lenses from -25 to +40 diopters. Otoscope head with removable 4x magnifying lens, and insufflators fitting. Bayonet head locking mounts for secure connection to the battery handle. Welch Allyn disposable polypropylene ear specula in 2-3/4mm and 4-1/4mm sizes are convenient, safe, and economical. "C" cell powered battery handle with rheostatic on/off switch. Optional adapter to allow use with Welch Allyn or compatible disposable specula. Complete in zippered case with fitted foam insert that is scuff and scratch resistant and cleans easily.