Accurately measures muzzle velocity from 15 - 2,600 feet per second (also measured in MPS). Measures RPS and RPM. Measures joules (power) from 0-500 J. Automatically shuts down once the system reaches lower than 3.3 volts. Clear, easy to read digital LCD display with backlight. Integrated tripod mount allows for easy tripod mounting (Tri-pod not included). Auto power-off setting (user customizable). 1M high frequency horizontal range 0-400 meters (0-1250 feet). Operates with 3x AAA batteries (not included). Memory slots for weight and caliber. 1X Chronograph