The Wow slim X2 is designed with quality and durability in mind. You can order with confidence, knowing that quality is built in. This ultra portable small machine is battery operated and will help in making sure that fatty acids are flushed through the system rather than being deposited in the body. It also Improves body circulation which in turn promotes a healthier living. Amazing massager for stiff shoulder, numb nerve endings, exhausted muscles and promotes blood circulation.