810nm laser hr system 1 Safety:DP mode. Sapphire cooling 2 800W; ... out on dark skin types. From the therapeutic point of view, other wavelengths are, apparently, more effective. For example, ... , strong cooling.Long lasting working time: copper heat radiation system Technical specification : LaserMeDio810TypeAlGaAs laser diodeDiode optical power800WNominal wavelength810nmPulse Width20ms-400msPulse ...