Features:2.5V PocketScope Ophthalmoscope uses halogen illumination for true tissue color and consistent, long lasting illumination. It has 6 aperture selections for general and specialist use, and 48 lenses for better resolution.2.5V PocketScope handle has a smooth rheostat to control light intensity and features a handy pocket clip.Product Information:Welch Allyn quality in a convenient pocket-size set. Key Components: 2.5v PocketScope Ophthalmoscope without Handle 2.5v Halogen HPX Lamp 2.5v PocketScope Handle without Batteries 2 - "AA" Battery Soft Case for PocketScope and CompacSetShipping Weight:2lbUseful Links:Technical Specifications