To use RedEye you need the RedEye hardware device, a wifi connection, and the free app. The RedEye hardware is a base that is also a charging dock for your iPhone. I like that they thought to add that helpful feature to the design. I can never have enough chargers for my phone. If more than one person in your home has an iPhone or an iPod Touch - you can all set up your own remotes on your own devices and you can all use them at the same time. Another cool feature is the ability to set your iPhone to do things like change the channel by tilting forward or lower the volume by shaking left. With RedEye you truly get to create a remote that is just right for you - even going so far as the arrange the layout of the buttons on the remote to suit your preferences. All in all - I really love this device. The only complaints I have about it is that the setup process is a little lengthy but I strongly recommend watching the instructional setup video on the site (huge help!). It was time consuming finding all of my devices in the app database and then setting up the activities. However, once you are done it is so worth your effort!