The Tria has a small laser aperture opening slightly larger than 5mm in diameter. You move the device 5mm at a time in an overlapping pattern over your skin. So it takes several pulses to cover just a small area.
I'm a bit obsessed with home beauty devices. It's a habit I've had for around 7 years now. I love the science, testing and reviewing them, and sharing my experience and feedback on my site WeAreBodyBeautiful.com. I'm also a crazy dog lady, and I don't care.