What Makes Tria Laser 4x a Best Buy? Believe it or not, Tria 4x is the first and the only laser that has been approved by the FDA for safe use at home. Not only that, but also it has proven itself to be the most powerful and effective laser for home hair removal. Is number one seller on Amazon!! Scroll down to read my laser 4X review. Tria Beauty 4x  uses the same diode technology that a doctor will use in…