Hillrom - Welch Allyn Pocket Set "AA" Batteries with Otoscope/Ophthalmoscope in a Soft CaseEither in the office or out of it, you'll always have the accuracy and convenience of Welch Allyn diagnostics, right in your pocket. Features; 2. 5v Ophthalmoscope with consistent, long lasting halogen illumination for true tissue colour 2. 5v Otoscope with built in throat illuminator gives you two instruments in one, with halogen illumination and fibre optics for cool light Adjustable rheostat to control light intensity Two slim brass power handles