That depends where you are located (it’s not FDA certified for the USA). It’s a 2-channel unit with a selection of programs, but I’m not intimate with it. I think it has 15 programs available for each sex, including active recovery. It’s not as powerful as the Premium models (100 mA vs 120 mA); the pulsewidth is not as long (400 vs 450 microseconds); it doesn’t have rechargeable batteries; it’s not menu driven, therefore less intuitive than the Premium (i.e. you need to carry the manual with you to know what your selection number corresponds to, in terms of program). All the above parameters are anyway greater than the corresponding ones of the 4000R.