Pinsensor technology provides fast measurement with accuracy, to measure overlapping subjects. Perfect for measuring golf flags and you can easily switch units between meters and yards. Vibration on/off function: When the flag distance is locked, the machine will vibrate automatically,if you don't need this function, you can turn it off as your need. Three modes: Ranging mode,Flag locking mode and Speed mode. Support speed measurement, short press the power button after targeting the moving object, the speed data will be displayed on the screen. Premium golf/hunting mate:Magnification x objective is 6x 25mm; range measure accuracy is +-1yard,speed measure accuracy +-5km/h.Perfect for carrying while golfing or hunting, or for measuring and surveying without extra weight or bulk. Battery USB Charging:Different from others with External removable battery,this one use Built-in rechargeable battery for device,No worry to change battery of device.