Our SilkPro Laser Hair Removal Device next to another device we are working on. If you want to learn more about our Laser Hair Removal device and perhaps purchase one, you can do so here: https://www.amazon.com/dp/B073JLL8YV -Unlike other laser hair removal devices we don't use cartridges or replaceable lasers -Our device also comes with a power cord so you won't need batteries -Average permanent hair removal is around 8 treatments.