Easy to use belt loop clip securely attaches with one hand.
With the rangefinder clipped through your belt loop, insert the nylon strap between the limb of your bow and your bowstring and then loop the strap over the cam end of the bow.
As you climb the tree, the tape measure will unwind.
After getting into your stand, and before hoisting your equipment, check the tape measure to see how high you are to CHEST level.
Hoist your equipment up then, simply, reel in the tape.
Pick out some landmarks around your hunting area and aim the rangefinder at the base of the object using the pistol type sights on top of the rangefinder.
While aiming, press and release the oval button on the left side of the rangefinder above the window. This will release the pendulum and allow it to swing freely and then lock back in place. Hold the button in for a couple of seconds to allow the pendulum time to stop swinging or bump it in and out to make it settle quicker.
Turn the rangefinder so that you can look at the graph on left side. Find the height that you previously measured on the right side of the graph and follow the line out to where it intersects with the pendulum. This is the HORIZONTAL DISTANCE or shooting distance to the target. In the picture, if you were 20 feet up the target would be 23 yards; 25' chest height the target would be 29 yards; and etc.
It is as simple to use as; aim, press a button, KNOW THE DISTANCE!