Illumination Form: Fiber optics transmit light Illumination of light spot: The brightness of thetip 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