I bought my now 9 year old daughter the Hidrex PSP 1000 when she was 8. Undecided to spend the extra money and go with that unit because she was so young that any pain or discomfort was unbearable. This unit allows her to switch between two different types of currents one of which she doesn’t feel anything but a slight tingle. She has used the machine for a year now ( maintenance mode) and is sweat free. It took her three weeks if trial and error to see what settings worked best for her but 3 weeks if trial and error and now once weekly maintenance. Well worth it I highly recommend it. She ended up finding 20 minutes a day at a setting if 20 worked best for her. Good luck and Hidrex has a 60 day money back guarantee. I worked with their customer service center and was pleased. I live in the USA and they are in Germany I received the machine in a week!!! Good luck!!!