... ,Knee Injury,Achilles Tendonitis,Rotator Cuff,Strained Lower Back Laser Therapy Device(diode laser)-MDL500,500mW,made in China.1).Irradiation treatment principleMDL ... power is 0 to 500mw, which can be regulated continuously. laser output is stable. that hassmall volume, light weight , good operation ... input :AC220Vor110VWarranty: 1 year Non-invasive Pain relief handheld Diode Laser Therapy Device