Back panel
AC inlet (AC IN)
Used to connect the power cord. link
Bluetooth button ( 
)
Used in the Bluetooth pairing settings. link
Digital Audio Input (OPTICAL IN)
Used to connect audio devices with a digital optical cable. link
USB Input (USB 5 V/1 A)
Used to connect USB storage devices. link
NETWORK connector
Used to connect this unit to a wired Ethernet network. link
Speaker terminals (SPEAKERS)
Used to connect speakers. link
Subwoofer connector (SUBWOOFER)
Used to connect this unit to a powered subwoofer. link
Analog audio connectors (LINE IN)
Used to connect audio devices with a stereo RCA cable. link
AUX jack (AUX IN)
Used to connect audio devices with a 1/8 inch (3.5 mm) cable. link
Used to add the HEOS device to your wireless network. link
CONNECT button
Used for Wi-Fi setup.
Connect in status LED
Indicates the status of this unit. link