The pulse width of this machine is 600ps, so no injury for skin and fast results. Also we use most advanced Honeycomb mirror to make energy more stable and average. We are the first manufacturer for pico laser tech and FM-PS has got a patent in China, you can not find the second one in the world ! Here is the introduction video https://youtu.be/PvmZxrzH3CU Pulse width test video to see it is real 600ps https://youtu.be/fHDdlmTpag0 -- Nami Department Manager Beijing Forimi S & T Co.,Ltd WEB: www.forimi.com SKYPE: nami@forimi.com FAX: +86 1060418366 MOB: +86 13702133116 (WhatsApp & Viber) ADD: West zone 2nd floor, Building No.5, Mauhwa Industry Park, No.1 Caida 3rd Street, Shunyi District, Beijing China.