The air 3 didn’t reduce any of my chin hairs as promised. BEWARE they’ll ask you to extend your trial in a bad faith attempt to run the clock out on the return window! I requested to exchange for air 10 with a coupon (cheaper than original purchase of air 3) due to more joules but they wrote back and said it’s not got more power or joules which wasn’t true. This caused a delay and then they wrote me back saying I can’t return at all. I used it faithfully for 3 months but it didn’t reduce a single hair on my chin! It did reduce my thinner previously lasered bikini by about 50% but I didn’t buy it for that. It isn’t strong enough for thick hair.