BOBLOV 650Yards Golf Rangefinder with Slope and Pinsensor Support Vibration USB Charging Flag Lock Distance Speed Measurement Range Finder BOBLOV LF600AG Rangefinder has a 600m measurement range with practical measurement modes: Ranging mode, Flag locking mode, Speed mode. The range finder is suitable for measuring high reflectivity objects(such as highway`s Road signs), moderate reflectivity objects(such as building`s wall) and low reflectivity objects(such as tree, gofl flag, utility pole, animal etc.)When the reflectance is reduced to a certain extent, the range will be reduced accordingly.  Specifications Range: 6.6-656(yd)for LF-600G Range Measuring Accuracy: Within 400 meters, +/-1M; Exceed 400meters,0.4% Angle Measuring Range: -60°-60° Angle Measuring Accuracy: ±1° Measuring Range of Speed: 20-300km/h Magnification: 6X Effective eyepiece: 16mm Exit Pupil Diameter: 3.7mm Object Lens Size: 22mm Field Angle: 7.5° Battery: Build-in lithium battery 3.7V/800mAh Weight: 168g/5.9oz Dimensions: 118x75x40(mm)/4.6x3.0x1.6(in) Operation Temperature: -10℃-50℃/-50℉-122℉ Power Adapter: 5V/0.8A  Mode Description 1.Ranging mode, short press the power button after targeting, the distance will be displayed on the LCD. 2.Flag locking mode, aiming at the flagpole or other targets, and short press power button, move the cross sign on the screen slowly from one side to the other side of the target, when the flag sign stop flashing and the machine vibrate(about 1second), range data to the flag will be showed on the screen. 3.Speed mode, short press the power button after targeting the moving object, the speed data will be displayed on the screen.  Package Included 1 *rangefinder 1 *USB charging wire 1 *operation manual 1 *carrying bag 1 *lens cloth