The unit is supplied with a 3V its storage case and instructions for its operation. It is used very simply since it has only one button that allows to do all its settings. When the lights for the first time, the rangefinder measures the distance in yards. Simple handling on the top button adjusts the distances in meters. It integrates the "jolt" function that vibrates when the distance that one seeks is locked by the device. The matter of this rangefinder is really nice, non-slip and it is very light and strong. The speed and measurement accuracy is outstanding, it can also be used outside of a golf course. Its cover is very strong very good, I remove him a star for the price that I find too high for the available functions.