Booster kit
I bought a booster kit two months ago, been using it for a month, then the device stopped working, started to contact them. And a quick response, they guided me step by step. Now they're gonna ship me the new one, and also without shipping back the old one, plus they are going to give me a gift. And also, they apologized for what happened to me! The reasons why I still give them 4 out of 5 are because the product.