ADC Otoscope Set, Pocket Size, Xenon Lamp, 2.5V, Hard Case, Diagnostix 5111N Fiber optics for cool, obstruction-free light transmission. 2.5v Xenon lamp for true tissue color. Wide angle swivel 2.5x viewing lens permits instrumentation. Insufflator port (fitting and insufflator sold separately) for pneumatic otoscopy "AA" battery handle (batteries included) with on/off power switch integrated into pocket clip Includes tube with 5 each Welch Allyn 2.75mm and 4.25mm specula Otoscope in hard case measures 7 1/4 x 4 1/2 x 1 1/2, weighs .78 lbs