I see that you have some general questions about the Slingbox installation, let me help you with that. In order to install the Slingbox, you will need to connect it to an A/V source and a router, this way you can stream the Slingbox content to a computer.
If you want to stream the Slingbox content to a TV you will need additional equipment such as a SlingCatcher, which will need to be connected to the TV and a router in order to work properly.
It is not possible to stream the Slingbox content to two different televisions without having this setup. Feel free to visit this link for additional information on how the product works.