Technical Parameters Size: Height:1300mm, Arm length: 1300mm (longest), feet wide:590mm The weight:18kg The input voltage: AC 110V~240V,50/60HZ The output voltage:18V Power consumption:40VA Blue light wavelength:460-490nm Blue light density:200-300mw/cm2 Whitening time: Each course of irradiation for two or three times, each time 10-15 minutes