The otoscope is used to view the tympanic membrane and external ear canal to diagnose outer and middle ear pathologies. It is the mostly used device in ent. features: 1. Fiber optics transmit light system, the fiber optics extend to the tip of the instrument for more light output, less glare. 2. 2.5 x magnification 3. Disposable specula: 2.5mm and 4.0mm 4. Insufflation port: view tympanic membrane using an insufflator bulb. 5. Smart design, convenient for mobile diagnosis. 6. Ot8c is available with aa alkaline or ni-mh batteries. The bulb is 2.5v, 1.6w. technical specifications: illumination form: fiber optics transmit light illumination of light spot: the brightness of the tip is =1000 lx magnification of lens: 2.5 x diameter of ear-specula: 2.5mm, 4.0mm insufflation port: yes type of bulb: t4954 (2.5v, 1.6w) rated voltage: 2 aa alkaline or 2 ni-mh batteries electrical safety standard: iec60601.1, ce, fda.