Specifications
Pupillary distance of eyes	45mm - 82mm both, 22.5mm - 41mm
Working distance grrades	30cm, 35cm, 40cm, 50cm, 65cm, 1m, 2m, infinity
Indication error	<.5mm
Asymmetry error	<.5mm
Rounding error	<.5 mm
Auto shut off	1 minute
Dimensions	212mm x 158mm x 58mm
Weight	.6Kg
Power Supply	6V DC
Warranty	2 years