For examination of the inner ear 3.5v Diagnostic Otoscope Head features: Fiberoptic light transmission for an unobstructed view Optical glass reduces reflection and provides 3x magnification Bidirectional swivel lens allows instrumentation. Insufflator port for pneumatic otoscopy. Compatible with Welch Allyn specula Universal bayonet mount for compatibility with other brands of 3.5v power supply handles Anti-theft locking feature is standard AdLED illumination 2 year warranty on instrument....