Features:

Easy to replace the battery. Power off automatically by lying it down after operation.

Power can be conserved and the lift time of the battery is more than 6 months.

Specification:

1. Method of measurement: Cornea reflection light coincidence method.

2. Range of measurement: 45 to 82mm(both eyes), 22.5-41mm(single eye)

3. Graduation: 0.5mm

4. Range of focusing point: 30cm to infinity

5. Auto-off time: 1min

6. Power: DC 4.2V

7. Size: 310*230*110mm

8. Weight: 0.8kg