Harman Kardon AVR 1510 5.1-Channel 75-Watt Networked Audio/Video Receiver 5.1 surround sound system with 75 watts per channel Integrated Green Edge technology uses ultra lightweight digital amplifiers to create powerful, precise amplification. Four 3D-ready HDMI inputs Front-panel USB port for connection to compatible Apple products or USB sticks Harman Kardon remote app for compatible iOS Android smartphones and tablets