Wi Digital Systems AudioStream Pro AV Owner's Manual page 46

TRANSMITTER FEATURES
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Lock:
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Mode:
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Press and hold for 2 seconds to lock the function key pads on the Transmitter
and the Receiver to preserve all settings and prevent accidental triggering of the
function buttons during operation. Press once to unlock the Transmitter and
Receiver function key pads and restore normal operation..
Press and hold for 2 seconds to select the desired operation indicated
by the following blue LED flashing sequence. Continue to hold to cycle
between the three operating modes.
Stereo Mic-In Mode Solid Green LED and Slow Blue LED Flashes.
Mono Mic-In Mode Solid Green LED and Fast Blue LED Flashes.
Stereo Line-In Mode Solid Green LED and Two Blue LED Flashes.
Refer to the "Tx Button Functions" on page (50) for more details.
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