Description: This is a golf sighting instrument that uses precision optics and digital technology to measure distance. This is a very safe distance testing device, without any form of energy radiation, and will not cause any harm or damage to the human body during the measurement process. Features: 1. Green mode. (Designed for golfers, you can easily get the distance between holes) 2. (Applicable to the general situation, first enter the height of the target, 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 Button cell battery Dimensions: About 90x50x38mm/3.54x1.96x1.49'' Instructions for use: 1. Pressing the power switch/adjustment button to start the instrument will directly enter the grass function mode. 2. When playing golf: a. Enter the height of the ruler where the code is (2.6 yards). Align the bottom line on the screen with the horizontal line of the lawn. c. Raise the scanning line position to the top of the golf club and press the power switch/adjustment button. Numbers will be displayed at the top of the screen, indicating the distance between the ball and the hole. 3. To measure distances to special targets: a. When you use the function buttons, the instrument enters the general operating state and the screen displays three digits and a decimal point. Press the function button to move to the ten place, and then press the power switch/adjustment button to input the number, the range is 0～9. c. Repeat the above steps to set the number of digits and the decimal point below. d. Press the function button 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 on the screen with the bottom line on the object. Press the power switch/adjustment button to switch the scanning line position up to the top of the target. A number will be displayed at the top of the screen, indicating the distance between you and the target. Enter its height. Kindly Reminder: 1. The displayed distance corresponds to the specified height unit. 2. Operation.3 Automatically shuts off after 60 seconds. Do not use this product to observe the sun, it may 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. Thank you for your understanding. Batteries not included: 1 x Monocular Rangefinder