Actually sir...wala sya kinalaman sa lakas ng signal mo......injector is to bypass lang ung mga restrictions ng internet..ex: ako nk converge fiber internet plan 40 mbps....gummmit me ng injector kc ung isang site na inaacess ko is meron restriction when it comes to country.....yes the speed also affects using vpn, but it depends pa din sa capabilities ng server na gamit mo.