Sennheiser 502399, HMEC 26, 523983/A01 Activating the “auto shut-off”function, sufficient

The operating time with batteries/rechargeable batteries is approx. 60 hours.

With NoiseGard™ switched on (see page 10), the LED provides information on the remaining battery/ rechargeable battery capacity.

LED	lights up yellow: The battery capacity is
		sufficient.
LED	lights up red:	The batteries are flat.
		Replace the batteries.

Activating the “auto shut-off” function

The battery-saving “auto shut-off” function automatical- ly switches the NoiseGard™ electronics off when the headset is disconnected from the audio system or when the aircraft avionics are switched off. The headset is de- livered ex-works with the function deactivated. You can activate “auto shut-off” as follows:

￿Set the switch to the position ASO.

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