ASG Calc is an utility software for AirSoft allowing you : - to calculate the power/speed according to the weight of the BB used - to carry out conversions in 4 different units (Joules, FPS, KM/H, M/S) - to visualize instantly all speeds (fps and m/s) for BB from 0.12g to 0.50g - to calculate the time of load of the batteries (with an integrated timer)