YZ24B
| Illumination form | Big Spot, Slit, Net, Red Free |
| Diameter of filter | 0.2~0.4mm |
| Illumination brightness | ≥80IX |
| Dioptor compensation | -35D~+20D, 24 in total |
| Illumination source | 3.5V/2.8W, Halogen Bulb |
| Power | AC220V/50HZ or 110V/60HZ
2# Alkalescent Battery or 2# Rechargeable Battery |
YZ11D
| Working distance | 0.67m |
| Streak | 3~20mm |
| Illumination source | 3.5V/2.8W Halogen Bulb |
| Streak rotation | 360º |
| Input voltage | AC220V ±22V/50HZ ±1HZ
AC110V ±11V/60HZ ±1HZ |
| Power(Main body of Ophthalmoscope) | Li + battery pack DC: 3.7V |
