With 6 different heads for different massage applications, 11mm amplitude, and 5 different frequencies, this massager is excellent for whole body massage, provided that you still need another hand to massage your back which you cannot do it yourself.
The 2 stainless heads are for the purpose of oil massage. With the flat and round heads, you are able to massage all your different muscle(large or small), deep or shallow. With 5 different massage frequencies, you are able to find the one that makes you feel most comfortable and relaxed during and after massage. Try different heads and frequencies, and find the most suitable combination for your specific part of muscle. Everyone might have different combination for different massage application, you just need to try and find the best combination for yourself.