Features:
Easy to replace the battery. Power off automatically by lying it down after operation; while power on atuomatically when pick it up. Power can be conserved and the life time of the battery is 6 months or more.
Parameters:
1. Range of measurement:
Pupillary distance of two eyes: 45MM-82MM
Pupillary distance of the left and right eyes: 22.5-41MM
2. Method of measurement: Cornea reflection light coincidence method
3. Graduation: 0.5MM
4. Range of focus point: 30cm to infinity
5. Automatic shut-off: 1minute after operation stops
6. Power source: DC 4.2V
7. Overall dimension: 310*230*110(MM)
8. Weight: 0.8kg