it has accelerometers measuring the linear acceleration of the racket through three dimensions and gyros which measure the rotations of the racket in three dimensions, because when you hit a shot you are moving the raquet quite fast and you or i cannot really track that, but the accelerometers that we have on here, send data about 1000 times a second, we check it and we process it, using some machine learning and some ai. there is a more serious side to this. sport is not the only area where humanoid robots in combination with motion sensor technology could bring value. we have been working with squash coaches and physiotherapists who went on one to one individual squash coaching sessions and physiotherapy sessions. there are so many similarities in terms of the individual, repetitive nature of the exercise, that both groups of people are doing.