The Gowllands Mini Ophthalmoscope is robust and accurate. The ophthalmoscope comes in a size that is convenient to carry in a pocket and features 20 levels of magnification from -25x to 40x.
Features:

Carrying Pouch Included
Requires 2 AA batteries (not included)
Length - 7.75";
Power lens range: from -25D to +40D
Made in United Kingdom
One (1) year warranty