... machine (JZ-3,JZ-3A), laser beauty, laser treatment, laser surgery, laser physical therapy etc; Portable 15W CO2 laser therapy apparatus (JZ-3, JZ-3A) have ... 3A);Output Method: with two working head, focusing and defocusing;Laser Beam Output control: manual control;Cooling: inside circulating water cooling ... *130mm;Weight: 6kgs(JZ-3), 9kgs(JZ-3A). 15W CO2 Laser Therapy Apparatus therapy instrument