A method of treating tissue of a patient uses a device including a mother case, a belt, at least one treatment unit and at least two applicators. The treatment method may include attaching first and second applicators to the belt at a working distance to the patient's surface, and providing different treatment energy to the first applicator and the second applicator. A treatment pattern is created by the applicators providing the different treatment energies. The hardware pattern or positions of the applicators on the belt may be changed before and/or during the treatment. The hardware pattern may be based on selected treatment effect and body part.