DESC: Features:Features halogen illumination and fiber optics for a cool light with no reflections or obstructions, plus a rectangular viewing lens for instrumentation under magnification.2.5V PocketScope handle has a smooth rheostat to control light intensity and features a handy pocket clip.2.5V Otoscope also has built in throat illuminator - two in one instrument!Product Information:The Welch Allyn 2.5v PocketScope Otoscope/Throat Illuminator with AA Alkaline Battery Handle (Model 22820) is a quality instrument in a pocket-size set. Key Components: PocketScope Otoscope (Head Only) 2.5v PocketScope Handle (without battery) 2 - "AA" Battery 2.5v Halogen Lamp Warranty: Welch Allyn will repair or replace, free of charge, any parts of its own manufacture proven to be defective through causes other than misuse, neglect, damage in shipment, or normal wear.Shipping Weight:3lb