Complete with 3.5V coaxial ophthalmoscope and Desk charger

Illumination source................................................3.5V Halogen lamp
Diopter compensation.....0D, ±1D, ±2D, ±3D, ±4D, ±5D, ±6D, ±7D, ±8D, 
                                                 ±9D, ±10D, ±12D, ±15D, ±20D, -25D, +40D
6 standard apertures................cobalt blue filter, micro spot, small spot,
                                                                    large spot, slit, fixation aperture
2 standard filter................... red-free filter, cross-linear polarizing filter