The new Arduino Tre board. Near-side of board: USB (left), HDMI (middle) and Audio In/Out (right). Far-side of the board: 5V power jack (left), micro-USB (lift-middle), Ethernet (right-middle) and USB (right). In the middle we have GPIO headers for the ARM processor, along with Arduino form-factor headers for the AVR processor. Right in the middle are headers to insert an XBee radio.