The SES-X-FA2 battery-powered audio over fiber extender sends 2 channel balanced mic or line level audio signals up to 12.4 miles over a single mode fiber cable. The transmitter and the receiver each feature two balanced XLR inputs and two XLR outputs, and a simplex ST connector. The transmitter includes a switch for selecting mic or line level for each channel. Designed for studio or field applications, the transmitter and the receiver can be powered with AC power adapters or 9VDC batteries (both included).