XCORTECH X310 Airsoft Pocket Chronograph

Initial velocity range: 1m/s to 300m/s (3fps - 980fps) ROF measurement range: 75 ~ 6000 (rate of fire) Calculate muzzle kinetic energy from 0.1 to 800 joules LCD display High-quality DOT Matrix backlight Micro-USB external power input (no battery charging function) High-density IR detector for projectiles fired 3 memory options to store various weights and calibers of ammunition Memory with 25 records of Speed ??and ROF Tripod Ready (Screw for standard camera/camcorder tripods) Power: AA Battery x 1 or External Micro USB Weight: 60g Dimensions: 72mm x 47mm x 51mm