http://www.sodolux.com/health-light-therapy/ Two switches control 660nm Red light and 850nm Near Infrared light, with three different working modes. With daisy chain function, several therapy lights could connect together meet customer's different requirements. led light for pain can quickly and effectively decompose fat cells, lose weight and detoxify, increase skin luster and skin elasticity, promote the activity of the lymphatic system, and achieve the effect of slimming. It can also increase energy and make your body more relaxed and stretched. Item600W Red Light Therapy Device Brand NameSODOLUX Model No.MATE600 Power600W Wavelength660nm:850nm=1:1 Light ColorRed+Infrared Led Quantity60pcs Dual 5W LED chip Size61脳22脳6.5cm VoltageAC85-265V FlickerNo Flicker/Flicker FREE Beam Angle60 degree Time ControlYes Led ControlYes FunctionAnti aging, pain relief, skin rejuvenation.etc health and skin care Emf0.0 碌T @ 4" FAQ Q: R900..dual chip..what is the advantage of that? A: led light for pain the light with dual chip will have higher power, higher irradiance. Q: If you only want NIR, can you put all the dual chips working together as IR? 900w IR? A: Yes Q: Does it come with a stand?(MATEPRO300) A: YES Q: And what is the audio link cable for...? A: This is a serial line, you can connect two devices at the same timeCheap Health Light Therapy website:http://www.sodolux.com/health-light-therapy/