Duet Display allows you to use your iPad or iPhone as an extra display. Developed by a team of ex-Apple engineers, duet is the first high performance solution that has zero lag. Work more effectively with duet. An additional display can increase productivity for engineers, musicians, designers, and artists by up to 48%. To setup, download and open duet on your Mac (for free) and on iOS. Connect your device using a lightning or 30 pin cable. No need to worry about firewall settings, Wi-Fi speed or your 802.11n network. Duet is secure, simple, and allows you to use your iOS and OS X devices in harmony. And feel free to use your touch screen for interaction with your new display.