Satellite M505D-S4000RD Q1-2 Dual-core processors let you do more at once. They are also energy-smart and sip battery power Power up your smart phone and other favorite portable electronic devices, even when your Toshiba is asleep or off S/P DIF Digital Audio Port: Tap into a home theater system to take advantage of big multi-speaker sound. Enjoy the ability to pinch, swipe, rotate or scroll through images on the display screen Experience full 5.1 surround sound on a home theater, or enjoy immersive virtual surround sound through headphones