A TV antenna can comfortably provide a signal for up to six televisions. But you will need a splitter to help divide the signal among different outlets, and potentially a booster. The booster will amplify the signal if you're in a poor reception area and improves sound and picture quality across multiple TVs. If you’re looking to install splitters or boosters, it’s best you seek help from a professional electrician who can recommend the best setup for optimum performance.