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Using Your Headphones

1.  If you intend to use the headphones for noise reduction only, simply turn the 

power switch to the “ON” position. The LED on the controller will light. In this 
mode, no cable connection is required.

2.  Turn the power switch to “OFF” if noise reduction is no longer required. The unit 

will then operate like normal headphones.

Noise cancelling headphones reduce unwanted ambient noise, providing a quieter 
environment to enhance your listening experience. These headphones can be 
used with or without the noise cancellation feature. Use the supplied plug-in 
adaptor for easy connectivity to in-flight music services. Please use the shirt clip 
on the back of the controller for secure and easy access to controls. For storage, 
simply fold the ear cups in toward the headband and place in your travel pouch.

Connection to an Audio Source

You can use the headphones with a variety of audio sources such as CD, DVD, MP3 
player, laptop computer or home stereo unit. To make a connection, simply insert 
the headphone plug into the phone jack or the audio source.
1.   Turn the power switch to “ON” and adjust the volume control to the desired  

sound level. Note that the power indicator light is lit.

2.   To stop the sound from the headphones temporarily, slide the mute switch to 

the right as indicated by the arrow on the cabinet. To cancel the mute function, 
slide the mute switch in the opposite direction.

3. Slide the power switch to the “OFF” position to turn off the unit after use.

FOUR | FEATURES AND USE

Summary of Contents for HEC NCH20

Page 1: ...ese instructions and keep these instructions Heed all warnings This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions This device may not cause harmful interference This device must accept any interference received including interference that may cause undesired operation Changes or modifications not expressly approved by the party responsible for c...

Page 2: ...nsert one R02 AAA battery in the battery compartment Ensure the correct polarity when installing the battery Insert the Negative end first 3 Align the battery lid with the battery compartment then snap to close the battery lid SAVE THESE INSTRUCTIONS TABLE OF CONTENTS TWO PARTS AND FEATURES THREE INSTALLATION INSTRUCTIONS Adaptor Plug Pouch Mute Switch Power Indicator Volume Control Thank you for ...

Page 3: ...t clip on the back of the controller for secure and easy access to controls For storage simply fold the ear cups in toward the headband and place in your travel pouch Connection to an Audio Source You can use the headphones with a variety of audio sources such as CD DVD MP3 player laptop computer or home stereo unit To make a connection simply insert the headphone plug into the phone jack or the a...

Page 4: ...hat the battery is installed correctly Power does not turn on Install a fresh battery There is no sound Check the connection to the AV device is secure There is no sound Check that the AV device power is switched on Specifications Speaker 40mm Dynamic Driver Impedance 32 Ohm 10 Sensitivity 106 dB 3dB 1 kHz Frequency Response 20 Hz to 20 kHz Active Noise Reduction 12 dB 300 Hz Maximum Power Handlin...

Page 5: ... be the sole and exclusive remedy available to the purchaser Correction of defects in the manner and for the period of time described herein shall constitute complete fulfillment of all abilities and responsibility of Haier to the purchaser with respect to the product and shall constitute full satisfaction of all claims whether based on contract negligence strict duality or otherwise In no event s...

Page 6: ... règlements de la FCC Le fonctionnement fait l objet des deux conditions suivantes Le dispositif ne peut causer de brouillage préjudiciable Le dispositif doit accepter tout brouillage reçu y compris le brouillage pouvant occasionner un fonctionnement non souhaitable Vos droits d utilisation de cet appareil peuvent être annulés si des changements ou modifications non expressément approuvées par la ...

Page 7: ...e compartiment de la pile Assurez vous d insérer la pile en respectant la polarité Insérez l extrémité négative en premier 3 Alignez le couvercle de la pile avec le compartiment de la pile puis appliquez une pression sur le couvercle pour le fermer CONSERVEZ CES INSTRUCTIONS TABLE DES MATIÈRES DEUX PIÈCES ET CARACTÉRISTIQUES TROIS INSTRUCTIONS D INSTALLATION Adaptateur Pochette Interrupteur de sou...

Page 8: ...x contrôles Pour le rangement pliez simplement les oreillettes dans le serre tête et placez le casque d écoute dans votre pochette de transport Raccordement à une source audio Vous pouvez utiliser le casque d écoute avec une variété de sources audio telles que lecteurs de CD DVD et de MP3 ainsi que les ordinateurs portables et la chaîne stéréophonique à la maison Pour établir le branchement insére...

Page 9: ...rs ne s allument pas Vérifiez si la pile est installée correctement Les écouteurs ne s allument pas Installez une pile neuve Il n y a pas de son Assurez vous que le branchement à l appareil audiovisuel est bien solide Il n y a pas de son Assurez vous que l appareil audiovisuel est allumé Specifications Haut parleur Excitateur dynamique de 40 mm Impédance 32 ohms 10 Sensibilité 106 dB 3 dB à l kHz ...

Page 10: ...nt la période de temps décrites aux présentes constitue I exécution complète de toutes les obligations et les responsabilités de Haier vis à vis de I acheteur en ce qui a trait au produit et constituera un acquittement complet pour toute réclamation qu elle soit basée sur le contrat la négligence la responsabilité stricte ou autre En aucun cas Haier ne pourra être tenu responsable des dommages ou ...

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