1927nm Thulium laser has beauty functions such as anti-aging and whitening, skin tightening, wrinkle removal, acne removal, import products, and assisting hair regrowth. Website: https://www.litonlaser.com/product/1927nm-thulium-laser-1550nm-erbium-laser/ 1550nm Erbium laser has a good effect on pigment removal, post-inflammatory erythema, traumatic scars, difficult-to-remove tattoos, moles, etc.