Par can be used to practice par times for USPSA or IDPA. You set a par time and try to beat the clock, simple as that. Features: - Random or 3 second start delay. - Adjustable par time, to tenths of a second. - Very easy to use. - Large button to start/stop timer. To change the start time, simply tap it to toggle between random and 3 seconds. To change the par time, simply tap it to type in a new par time, or use the plus and minus buttons to adjust tenths. Make sure your phone is not muted and the sound is up to hear sounds. Note: Does NOT detect audible gunshots, this app is for timing purposes only.