2.5v pocket diagnostic set with Xenon illumination. Fiber-optic otoscope, wide angle swivel 2.5x viewing lens. Compatible with Welch Allyn speculum, Insufflator port. Ophthalmoscope w/5 apertures and 19 viewing lenses. Compact instruments measure 7". Complete with tube of specula, "AA" batteries and storage case. 1 year warranty on instruments, lifetime on optics.