Perfect optics system offers clear image of eyeground. The filters and the glasses are imported from Germany, which are multi-coated, mildewproof  and anti-reflection.
 

Specifications:

Illumination form: Large light spot: 3.2mm, Small light spot: 1.6mm, Slit central-net, Slit, Redfree filter

Diopter compensation: 0, +/-1D, +/-2D, +/-3D, +/-4D, +/-5D, +/-6D, +/-8D, +/-10D, +/-12D, +/-16D, +/-20D, -25D

1. AC Powered Ophthalmoscope 

Light source: 3.6V/ 2.6W Mini-halogen lamp

Power supply: AC Power,  220V/50Hz or 110V/60Hz

Input power: 5VA

2. Rechargeable Ophthalmoscope

Fully charged can be continuously used for at least 2 hours. 
Light source: 3.6V, 2.6W Mini-halogen lamp
Power supply: AC, 220V/50Hz 110V/60Hz
Input power: 8VA

3. Pocket Ophthalmoscope 

Light source: 2.6V, 1.6W Mini-halogen lamp
Power supply: DC 2 batteries of A type/ 1.5v