Parameters:
1.Method of measurement: Cornea reflection light coincidence method
2.Range of measurement: 44~82mm(both eyes), 22~41mm(each type)
3.Graduation: 0.5mm
4.Range of focusing point: 30cm to infinity
5.Auto-off time: 1 minute
6.Power source: DC 4.2V
7.Size: 310*230*110mm
8.Weight: 0.8kg