This is the MYTREX EMS HEAD SPA PRO. I've used it about 5 times. It's waterproof, so you can use it in the bathtub. You can feel the electrical stimulation, and the pressure is comfortable. It's perfect for scalp massage. It comes with three attachments. I've confirmed that it works. I bought it, but I don't have many opportunities to use it, so I'm selling it while it's still in good condition. Head Spa Scalp Care Scalp Massage