1. LCD screen display：2.8TFT_LCD ，resolution ratio:240*320；

2. Equipped with voice guidance function,Adjustable volume,The panel adopts intelligent touch button design;IC card identification.

3. range of vision:0.1-1.5(i.e 4.0~5.2)；

4.Visual target judgment direction：Up、down、left、right,（Adopting the "C" notch direction of the landlot ring）;

5.Light stimulus brightness：5700cd/m2±380cd/m2;

6.Visual target brightness：280cd/m2±28cd/m2;

7.Dark adaptation visual target brightness：0.1cd/m2～0.15cd/m2;

8.Light stimulation time：30s;

9.Test data can be automatically displayed, uploaded, and evaluated;

10.voltage：AC100~220V, 50/60Hz；

11.The product has a third-party quality inspection report

12.Product configuration list：1 set of main device，1 power cord，1 IC card，1 copy of instruction manual