The Lucha T8 device can practically be used indefinitely, but it is stated 15 times because it practically means 7.5 hours a day; that is, since the device works for half an hour when it is switched on, then 0.5h x 15 = 7.5h. We take into account that a person works for an average of 8 hours, sleeps for 8 hours, and 8 hours are reserved for rest and relaxation, which is the best time to use the device. Of course, everyone should adjust the use of the device individually, depending on why it is being used in that specific case. It is sufficient to use it 2-3 times a day for a general increase in immunity, improvement of sleep and achievement of internal homeostasis. The only possible side effect during use that we noticed in only a few cases is a local feeling of increased heat at the place of use, which is not a contraindication for further use, but on the contrary, proof that the device works and exerts a local effect on the peripheral nervous system and microvascular system.