The Purpose of TERRA-EXII is the cost-e ective output device that comes with 2 balanced line outputs, 1 stereo line output (3.5 mm mini-jack) for audio monitoring via headphones. Furthermore, 3 control inputs work with RAC5/RAC8 source selector, volume controller, event triggering such as call/hang up, music play/stop, 3rd party command ,etc. And 1 relay contact output can be programmed to control an external device. TERRA-EXII is designed for point to point or multi-point audio distribution as well as converting the analog audio via Ethernet/Internet network without the need of a computer. Moreover, it supports up to 200MByte for music/message/recording storage. Also, the Micro SD card can storage all audio les.