Our Welch Allyn Premium Diagnostic Set includes our wide view PanOptic Ophthalmoscope head, a Coaxial Ophthalmoscope head, the Macro View Otoscope head and a Lithium Ion Rechargeable Handle in a hard, zippered case. Welch Allyn Lithium Ion Handles are lightweight and power 3.5 V Welch Allyn instrument heads for 120 minutes—twice as long as a conventional handle. The Welch Allyn Macro View Otoscope supports a bigger, better 2X larger field of view of the tympanic membrane with the widest focal range of any otoscope; built-in throat illuminator adds extra value.