Adjustable massage strength levels with gradual increase / decrease setting option. I have to say if you have chronic pain problems this is great for you. I have Lupus and more and trust me I used this and it felt so good. You can adjust the strength of the pulses. Attachment pads, Rechargeable Battery and Power Adapter included so that is awesome. There are 6 Auto programs which is different types of pulses. This baby has a LCD screen display. My husband has even used this after a long day at work for his soar muscles and it has helped him as well. This is great for joint and muscle pain this product is high quality and works great. I am very happy with this product it is worth every penny. I love that it has a rechargeable battery. This is small and compact so you can take this on the go or on trips which I love. This can be used on many areas and two people can use it or you can put it on two different spots. I was not sure at first as I was scared it would hurt but it does not. As you can adjust it to the strength you need and the pulse it also has pictures for different massage motions. I am in love with this product it works great and there is nothing like being pain free or your pain being reduced. I highly recommend this product as It has really helped me with pain I thought I was stuck with pain. Then I seen this product and thought it is worth a try I am glad I did. As this has helped me so much.