halo 4dTwo different lasers are combined in the HALO 4D. The Halo ® fractional laser delivers two different wavelengths, 1470-nm and 2940-nm simultaneously. The Dynamis Fotona 4D ® usesHalo 4 is the seventh installment in the Halo franchise. Set four and a half years after the events of Halo 3, Halo 4 continues the story of John-117 and Cortana, left abandoned on the remains