Golf swing practice/training device

A golf swing practice/training device configured to generate a signal when the power arm of a golfer is properly moved from the top of the backswing to the slot position in the downswing comprising an attachment element to mount the golf swing practice/training device to the power arm of the golfer and having a signal generator detachably attached to said attachment element by a signal generator mounting means for detachably attaching said signal generator to different locations on said attachment element so that said signal generator maybe disposed adjacent the golfer's power arm to engage the side of the golfer's upper body to activate said signal generator when the golfer's power arm is properly positioned relative to the golfer's body during the downswing, said attachment element comprises a strap to receive said signal generator therein, said signal generator comprises a compressible element capable of generating an audible sound when compressed by a golfer's power arm engaging the side of the golfer's body.