The rechargeable version of the 97200-MBI, the Welch Allyn 97204-MVS is an excellent lithium-ion powered diagnostic set.
The set consists of:

23820 | MacroView™ Otoscope

30% greater magnification and twice the field of view of a conventional otoscope give a large, almost complete view of the tympanic membrane.
Focusing wheel allowing for adjustable focal depth on the area in view without the need to move the otoscope, compensating for both the practitioner's vision and variable length of the patient's ear canal.
Better clarity and definition of landmarks than a conventional otoscope.
The Halogen HPX™ lamp provides light output for true tissue colour and consistent, long-lasting performance.
Fibre optics produce a ring of cool light with no reflections or obstructions for glare free viewing and easier examination.
Specula ejector for hygeinic touch-free disposal of used speculae.
Insufflation port for manipulation of the tympanic membrane.
A sealed system for pneumatic otoscopy and accurate diagnosis of otitis media.
Variable illumination strength via the handle rheostat dial.

11720 | Coaxial Ophthalmoscope

Halogen light for true tissue colour and consistent, long-lasting performance.
The coaxial optics produce a shadow-free spotlight, easier entry into undilated pupils and a larger field of view compared to standard ophthalmoscopes.
6 apertures:
- Micro - allows quick entry into small, undilated pupils.
- Small - provides excellent view of fundus through an undilated pupil.
- Large - general examination of the eye through dilated pupil.
- Fixation - graduated cross-hairs for measuring eccentric fixation or locating lesions.
- Slit - used to determine levels of lesions and tumors.
- Cobalt blue - used with flourescein dye to view small lesions, abrasions and foreign objects on the cornea.
2 filters can be used in conjunction with any of the above apertures:
- Red-Free filter - filters out red light for easy identification of veins, arteries and nerve fibers.
- Polarising filter - virtually eliminates corneal reflection.
28 focusing lenses with a range of -25 to +40 diopters, adjustable via easy-to-reach maywheel.
Rubber brow-rest prevents scratching of eyeglasses.
Variable illumination strength via the handle rheostat dial.

71904 | Lithium Ion Rechargeable Handle