We had this sit in a HS varsity game. It was a private school that had just moved to a different building, and therefore a different playing field. The field didn't have a clock before they moved there, and they got one donated. Unfortunately, they didn't check the dumb thing out before the first game. Of course, malfunctions galore. Since I was BJ that day, my R told me to let him know when it got to 4 minutes by blowing it dead, going in to inform him, and then he would wind her up again. He also asked me when it got to 3, 2, and 1 minutes, without stopping by just holding up the fingers, and he would yell it out to the wings who would pass it along to the coaches. Worked out great.