... one big contains four machines) feature: 1. dual working system that can be used by two person at the same ... it into the water.4,connect the wristband with the machine and put it on your wrist. 5,turn on ... the device 6,set the working time(TIME button).7,press ON/OFF to ... the bamboo waistband: 1,connect the waistband with the machine,put it around your waist.2,start the function ( ...