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. Stainless steel stand for holding your forehead, soft rubber holder for your nose, comfortable to measure. LED light source, low consumption. And the ruler will turn off automatically when it reaches set value or without operation in 30s , energy saving and prolong battery life. Pupilometer only, other accessories demo in the picture is not included! Specification: Powered by: 2 x AAA Battery (Not included) Material: ABS Power: 5W Error: 0.5mm Pupil distance: 40-80mm Left/right pupil distance: 20-40mm Size: app.21x13.8x5cm/8.27x5.43x1.97in Color: for Grey and Green 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