Contents | 
  | 
Important safety instructions  | 2  | 
Delivery includes  | 4  | 
The HMEC 250 headset  | 5  | 
Operating elements  | 7  | 
LED indications  | 8  | 
Preparing the headset for use  | 9  | 
Inserting the batteries  | 9  | 
Connecting the headset  | 9  | 
Connecting a mobile telephone  | 10  | 
Connecting an additional audio player  | 11  | 
Adjusting the microphone sensitivity  | 12  | 
Switching between mono and stereo mode  | 12  | 
Using the headset  | 13  | 
Attaching the cable clip  | 13  | 
Adjusting the headset  | 13  | 
Adjusting the volume  | 14  | 
Switching the TalkThrough function on/off  | 15  | 
Adjusting the volume of the TalkThrough function ....  | 15  | 
Switching NoiseGard on/off  | 16  | 
Replacing the batteries  | 17  | 
Folding up the headset  | 18  | 
Care and maintenance  | 19  | 
Replacing the earpads  | 19  | 
Replacing the wind shield  | 20  | 
Accessories and spare parts  | 20  | 
Specifications  | 21  | 
Manufacturer declarations  | 23  | 
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