Specifications Muzzle Velocity Range: 30-400+ M/S (90-1200+ Fps) R.O.F. Range: 100-6000 Rpm Muzzle Energy Range: 0.01-9999 Joule Power: 2X Aa Batteries, Micro Usb Cable Package Includes: 1X Chronograph, 1X Lcd Screen Color: Black Features High Quality Dot Matrix Backlit Lcd Display. Versatile Wireless Removable Display Screen. Additional External Micro-Usb Power Input. Large 38Mm Shooting Tube For Simple Allignment. High Density Ir Detector For Fired Projectiles. Precise Velocity And Rate Of Fire Shot Memory Log. Calculate Min/Max, E-S, Avg, S-D Via Shot Memory. 6 Memory Options For Ammo Weight And Calibers. Tripod Ready With A Reinforced Pc Panel. Extreme Speed And Energy Per-Unit Area Calculation. S-D Standard Deviation Analysis W/ Reinforced Pc Panel.