There are several different brands and technology lasers on the market today.  The latest is the new Pico technology. It has more energy with short pulse bursts and is much more skin sparing than the older Nano technology.   The key differences today amongst the PICO lasers is the amount of energy they can produce and how many wavelength settings it can use. Some lasers work just on blues and greens, some on just red and black and others have all the wavelength settings to remove all colors. You can read more about our laser here