The device is a high-thech portable machine,combining the functions of Telescope and laser range fingers,it changes the distance measure ways and also improves the efficiences. The device can measure the distance and the peed whileshowing the clear imagesand have some advanges such as high precision,short ranging time,visual display,low consumption and auto power-off. The device is safe to the eyes and the body by using 905nm laser and multi coating lens,and it can be used in several fields like the electrictity,the safe guard,the golfand the forest. Before operaations,please turn the body until the images through the two eyepieces focusing on one object,and then adjust the eyepieces unyil the images are clear.to glaes wearers,please remove the glaes or adjust the eyepiece cups. Magnification:6X Objective Lens: 24mm Maximum Distance Range: 600m -1500M Minimum Distance Range: 5m / 5 yard Accuracy: +-1m Field Angle: 7 Speed Range: 300km h Wave Length: 905nm Power Supply: CR2 3.0V battery Item Size: 120X75X41MM Item Weight: 178g Package Size: 118X81X41mm Package Weight: 210g Package List: 1 * Laser Rangefinder 1 * Carry Case 1 * Cleaning Cloth 1 * User Manual (English) 1* Battery CR2 3.0V