This Pneumatic Otoscope set from Welch Allyn includes a head, rechargeable handle and hard case. The head (20200) uses a Halogen HPX lamp for more light output for true tissue color and consistent, long-lasting illumination. Its rotating lens with ultra-seal allows for pneumatic otoscopy. Its fiber optic illumination produces cool light. It has a 10 Diopter lens, 2.5X magnification. The handle is a convertible version of Welch Allyn's universal rechargeable handle (71000-C). A convenient built-in charger allows you to plug the handle into any conventional wall outlet for overnight recharging. The 71000C model also includes a battery converter accessory that allows the handle be powered by C-cell batteries It has an adjustable rheostat control and a free-floating reserve setting that allows optimal intensity and battery life. Its smooth, non-abrasive knurled finish ensures a no-slip grip. Its chrome-plated brass handles provide durable, long-life construction. It has a safety switch to prevent accidental draining of the battery. Metal head connectors for durability.