... 2.full angel arm 3.build-in intra oral camera Teeth whitening,LED Bleaching system(Trolley-type)standard parameter: InputAC100-240VPower70WWavelengh460-490nmDensity250-380mW ... light; Accommondate to pigment nien teeth, interna pigment teeth, tetracycline pigmentation teeth and dental fluorosis; Better whitening effect,more comfortable Teeth whitening,LED Bleaching system(Trolley-type)