Every Shooting Chrony measures the speed of bullets, arrow, shotgun-pellets, air gun-pellets and paintballs, etc.-from 30/FPS (feet per second) to 7000/FPS with a better than 99.5% accuracy. Your Chrony can go with you anywhere. Just unfold, mount on a tripod or place on a table, insert diffusers (if needed) and shoot in less than 2 minutes. All Chrony come with a three year limited warranty. The Master Chrony has the same capabilities as their respective Shooting Chrony counterparts. In addition to that, the Master Chrony has a remote LCD monitor which brings the LCD (Liquid Crystal Display). (less)