Effective measuring range: 22 eyes pd - 41.5 mm. Left and right distance: 22.5-41 mm.
Value error of 0.5 mm or less. Rounding error of 0.5 mm or less. Measurable monocular target distance: 30 cm. Automatic shutdown time: stop for about a minute. Power supply: dc 6 v (4 AA batteries).
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