Duet Display allows you to use your iPad or iPhone as an extra display, using the charging cord to connect the devices. While other similar apps already exist, those apps connect using wi-fi, which leads to a lot of lag. Duet Display has zero lag and offers energy saving options plus it makes connecting your ipad to your computer screen a cinch. Duet Display also takes advantage of the iPad’s touch capabilities, allowing you to tap and scroll through whatever you choose to drag over to the second display, allowing ipad to computer screen share. You can also choose between regular and Retina resolutions and Duet Display works in either portrait or landscape mode. Just download the app on your iPad and for your Mac, restart your computer, and you’re ready to go. Any apple junkie would loves this gift under $20, and its perfect for any multi tasker or TV lover!