Do I need a video card or can I use a dual monitor splitter? ?

My church has a projector that is ran from a laptop for our power point system. We recently purchased another monitor so we can work off of one and have the other to show on the projector. Our laptop is new and does give me the option to identify multiple screens, I was wondering if I can just get a splitter instead of a video card to be able to use the dual monitor. Thanks for all the help you may offer!