First of all, if you want to reap the full benefits of the massager, you have to take note that you should not massage one particular area for more than 15 minutes, tops! However, if the massager moves around your feet, this can be timed to 30 minutes so you can fully be relaxed. The massager overall can be used for 30 minutes at any given time. For your next question, yes it can be used several times each day for as long as you want just make sure that you won’t go beyond 30 minutes or this can cause a counterproductive and can cause more harm.