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7. LED Indicator
The LED indicator flashes every 4 seconds when the
receiver is on and ready for use. The LED indicator will
blink on both the transmitter and the receiver when the
transmitter buttons are pressed.
The LED indicator color indicates the battery life level.
Green = Full charge
Amber = Medium charge
Red = Needs charge
If the unit is used while the LED indicator is red, it may
shut down automatically.