... your body 4Help relieves pain and tebsion 5relaxing dual system foot spa with MP3/dual system music ion cleanse /detox foot spaMODULE item ... contains four machines)feature 1, dual system design makes it can be used by two person at the same time2, with the detox function ... ) 2,the operation of the MP3 music function: 1,connect the headphone with the machine,put one the headphone 2,start the ...