1.No side effect,on the safe side.
2.Portable,easy to work.
3.Be nipped on middle of ear.it use to sleep well;be nipped on earlap,it use to slim.
3.It has a function which can automatically stop power for 15minutes.
4.It suggest that you use it 2-3times everyday.
5.Need to space above 4 hours when you use it one time. |