Stay Alert is personal attentiveness product. It is a vibrating, motion detection device designed to sense when someone is not in motion. This unique mechanism can discern if there isn’t movement and will vibrate until reset. The vibration occurs in intervals with increasing intensity depending on the length of time someone is still. It’s easy to use and operate. Small enough to wear like a pager, it clips to your clothes.  StayAlert can opperate conintinously for about 500 hours on 2 AAA batteries.