this diode laser combines 3 wavelengs 755nm 808nm 1064nm to 1 machine, with 1200-2000w high power it has super great effect in hair reduction. diode lasers allow light to penetrate deeper into the skin, making them safer than other lasers. because it can avoid the melanin in the skin n epidermis, which we can use for permanent depilation of all colors of hair for all 6 skin types, including tanned skin apply to any unwanted hair, face, arms, armpits, chest, back, bikini, legs... it also has skin renewal and skin tightening at the same time 1 years-warranty and 7x24 online after-sale service.syi