I bought this hair growth electric comb by #WisFun to see if it would help stimulate hair growth. I don't know ih f it will or not yet , as it's too soon to tell. That said it did feel great on my head as a massager. The main negative is that there arent varying intensity levels just one constant level. Also it does take 2 AA batteries that are not included in the box. But for $20.99 figured I had nothing th o lose. I'll use this for a month on a daily basis and will update my review.