Each unit factory calibrated to within +/- 0.25% accuracyIdeal for Firearms, Archery, Airgun and PaintballSimple operation, large LCD screenMeters Per Second (MPS) or Feet Per Second (FPS) readingsExtra wide sun screens for added shading in full sun operationSmart phone interface via included audio jack cableDisplays velocity, logs data, notes, weather conditions, easily exports via SMS or EmailCarry bag included