CAT No. OTO-200 Otoscope equipped with a 2.5v bulb and are used by two 1.5v alkaline batteries type āCā, provided with a rheostat to adjust the intensity of light, a removable glass allowing a 3X magnification and an output for air insufflation to check the mobility of the tympanic membrane. Supplied with 3 Plastic Ear Funnels. Specification:- Otoscope Head : 2.7v Halogen Bulb & bayonet connecting system. 3x magnification lens fitted supplied with 3 Autoclavable ear funnels. Reliable and indestructible high quality instrument. Invaluable for everyday ear nose and throat use.