brand new and high quality Features: Made of high quality ABS, it is solid, durable and high performance, long service life. High precision PD ruler with clear optical lines, can be easily operated and measure accurately and quickly. It can measure left or right monocular,and display the results of two eyes separately on LCD screen. With adjustable adjustable knob, it can be used for different subjects of sight, so that the measurement of interpupillary distance becomes simple and accurate. There is a +2.00D lens under measuring window to make a visual compensation. LED light source, low consumption. And the ruler will turn off automatically when it is set level, energy saving and prolong battery life. Pupilometer only, other accessories demo in the picture is not included! Specification: Powered by: 2 x AA Battery (Not included) Material: ABS Power supply: for DC 3V Error: 0.05mm Pupil distance: 45-82mm Size: app.27.1 x 19.2 x 9.4cm/10.6 x 7.55 x 3.7in Color: White Quantity: 1 Pc Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Pupilometer