The SLX4L wireless receiver offers unprecedented simplicity with features including Automatic Frequency Selection and Automatic Transmitter Setup. With included rack hardware and detachable antennas, it is ready for immediate installation right out of the box. Other features include a backlit LCD screen which provides group, channel and antenna information. A five segment audio meter lets you monitor the incoming audio signal from the transmitter. The SLX4L also includes logic output for use with software echo cancellation and remote battery life monitoring. Logic-enabled transmitters include MX690 and MX890.