Hi again folks, I recently wrote inquiring about the Sportrak receiver. Well, it may be that I was talking about the wrong receiver. It might be more effective for me to simply describe the receiver I will be working with. The receiver in question has a rather circular button layout, with a group of buttons ranged in a circle around at least one central button. What I'd like to know about this particular unit is how you determine whether the unit is on, i.e. on/off switch, any other buttons that I would need to know in order to answer this question. The receiver I'm used to seeing has a much more gridlike button layout, with buttons lined up left to right, an on/off button on the bottom right and a display light button on the bbottom left. I hope this clarifies things sufficiently. Thanks, Scott