Competitively priced 2.5v Diagnostic Set in a fitted case. ADC Standard 2.5v Instrument Set features: Ophthalmoscope head with lens wheel features 24 corrective lenses from –25 to +40 diopters Otoscope head with removable 3x magnifying lens, and insufflator fitting Bayonet head locking mounts for secure connection to the battery handle Welch Allyn disposable polypropylene ear specula in 2.75mm and 4.25mm sizes are convenient, safe, and economical "C" cell powered battery handle with rheostatic on/off switch Auto-clavable, polypropylene ear specula in 2.5mm, 3.5mm, and 4.5mm sizes Adapter to allow use with Welch Allyn or compatible disposable specula Complete in zippered case with fitted insert that is scuff and scratch resistant and cleans easily Weighs 20 oz. Inspected and packaged in the U.S.A. from foreign components Batteries NOT included Ophthalmoscope meets or exceeds ISO 10942, ISO 15004-1, and ISO 15004-2