Booster used to increase forward boost speed. Works well with a laser blade. Takes up both back weapon slots, but gives you an insane speed boost. When used with blades, it creates a lag effect online, making you glitch out and teleport about, making it somewhat game-breaking and arguably unfair. When used without blades, it's a solid option for CQC that allows you to close in faster. Mind it's energy drain and be prepared to forgo back weapons and you'll do fine with it.