SHR is a form of light therapy, standing for the upgraded version of intense pulsed light.
SHR emits a wavelength into the skin, which is absorbed by the pigment (aka your hair). This turns into heat, which kills the 'growing cells' that make the hair. Effectively, this puts the follicle into a resting phase, which means that hair growth gradually declines.
Nd: YAG Laser for Tattoo Removal and Pigmented Lesions
The Nd-Yag Laser is aimed at the ink particles under the skin which in turn breaks the ink down into smaller particles. The body then absorbs and flushes these particles out through the lymphatic system.