Otoscope is a handheld medical device used by ENT specialists to examine the ear canal and tympanic membrane. Featuring a light source, magnifying lens (typically 2-3x), and interchangeable specula (2-5 mm sizes), it reveals infections like otitis media, perforations, cerumen buildup, or cholesteatoma through clear visualization. Pneumatic variants assess eardrum mobility via gentle air puffs, aiding middle ear diagnosis. Modern LED models offer superior illumination over halogen; disposable tips ensure hygiene.