... light transmissions system, strong power supply system for high stable laser output.2, Exellent contact cooling for more comfortable and safe ... ~120V or 200V-240V 50Hz2,Laser Energy: 40J/cm2, 1~50 level can be adjusted3, Laser Wavelength: 808nm4, Laser pulse frequency: 1Hz5, Operate ... Pulse duration: 10~400ms8, Contact cooling: <5 degree by water9, Diameter: 420mm*380*1150mm Laser Hair Removal System