Description: This is a golf sighting instrument that uses precision optics and digital technology to measure distances. This is a very safe distance test device, without any form of energy radiation, and will not cause any harm and damage to the human body during the ranging process. Functions: 1. Green mode. (Designed for golfers, you can easily get the distance between holes) 2. (Applicable to the general situation, first put the target height in, you can measure the distance between the target and the object) Specifications: Objective: 28mm Eyepiece: 16mm Resolution: 13 inches Magnification: 7X The longest test distance is 930 yards (1 yards = 0.914m) Viewing Angle: 7.8 degrees Power Supply: 2 X CR2032 Coin Cell Battery Dimensions: About 90x50x38mm/3.54x1.96x1.49'' Operation Manual: 1. Pressing the switch/adjustment button to start the instrument will go directly to the lawn function. 2. When golfing: a. Enter the height of the ruler where the code is located (2.6 yards). Align the bottom line of the screen with the horizontal line of the lawn. c. Raise the position of the scan line to the top of the golf flagstick and press the switch/adjust key. Numbers will be at the top of the screen, indicating the distance between the ball and hole.3. For measuring distances to special targets: a. When using the function keys, the instrument enters the general function state, and the screen displays three digits and one decimal point. Press the function key to move to the ten place, and then press the switch/adjustment key to input the number, the range is 09.c. Repeat the above steps to set the number of digits and the decimal point below. d. Press the function key to complete the above input process. Based on the height you enter, the screen will display the minimum distance you can measure. Align the bottom line of the screen with the bottom line of the object. Press the switch/adjust key to switch the position of the scan line up to the top of the target. A number will appear at the top of the screen indicating the distance between you and the target. Please enter its height. Warm reminder: 1. The displayed distance corresponds to the entered altitude unit. 2. Operation.3 Automatically power off after 60 seconds. Do not use this product to observe the sun, it can cause eye damage. Note: Please allow 1-3 cm difference due to manual measurement. Due to different monitors and different lighting, the picture may not show the actual color of the item. Thanks for your understanding. Batteries not included: 1 x Monocular Rangefinder