Innovation takes bold steps. The original G-SHOCK GA-2100 line was introduced in 2019. Since then we’ve constantly innovated to evolve the GA2100 in new directions. Enter the electro luminescent GA2100HD-8A. Engineered with the same toughness and reliability as the original GA2100 line, the GA2100HD-8A sports a monochrome white face that reveals a sharp luminescent green glow in the dark.