... density:10-50J/ cm2Pulse width:0.1ms-100 msRepeat frequency:1Hz,2Hz,3HzCooling mode:internal circulating water + cooling ... time7 days About US Founded in 2005, Guangzhou BeYoung Beauty Equipment Co., Ltd. specializes in the research, development ... of professional beauty equipment. We have professional and advanced production lines, research & design department, excellent management system, skilled work ...