InTENSity Select Combo II Casting Supplies Ophthalmoscope head with lens wheel The unfolded towel measures Ophthalmoscope head with lens wheel features 25 corrective lenses from 20 to +20 diopters * Otoscope head with removable 4x magnifying lens and insufflator fitting * Bayonet head locking mounts for secure connection to the battery handle * C cell powered battery handle with rheostatic on off switch * Auto clavable polypropylene ear specula in 2 Memory Capacity: 60 Measurements * Simply choose a preset program by body part or customize a program to meet your specific therapy needs * The RUSSIAN setting provides 2500Hz for a deeper and more comfortable stimulation helping to reduce muscle spasms as well as muscle strengthening