[. . . ] Each is identified by a small symbol (circle, triangle) on the top of the plug. If your phone has a 2. 5 mm headphone/headset jack, you will need to use one of these adapters. Plug the headset with the adapter into the headphone/ headset jack on the phone. Put on the headset. Device with 2. 5 mm headphone/ headset jack Device with 3. 5 mm headphone/ headset jack Note: If your phone does not respond when you press the Answer/End button, you are getting partial or no sound, or the microphone is not picking-up sound, you may be using the wrong adapter. [. . . ] Be sure to attach the left StayHearTM tip to the left earpiece and the right StayHearTM tip to the right earpiece. Ease the base of the tip down around the base of the earpiece until the tip feels secured. StayHearTM tips Adjusting for comfort and stability There are several ways you can adjust your headset to provide additional comfort and stability. Using the adjustment slider and clothing clip you can customize how you wear your headset. Using the adjustment slider Move the adjustment slider up or down to reduce or increase the amount of loose cord between the left and right earpiece. Finding the right position for the slider can help optimize the placement of the Answer/End button and integrated microphone. Using the clothing clip Use the clothing clip to fasten the cable to your clothing, for convenience, stability, and to help manage the cable. This can be helpful during high-movement activities or when using the headset in a single earpiece configuration. 3 1 2 4 English Troubleshooting If you experience any trouble using your headset, try the following troubleshooting instructions. If you still need help, see the contact information on the inside back cover for assistance in your area. Problem What to do No audio/intermittent · Make sure that the headset plug is securely connected to the headphone/headset jack (not the line out jack). Sound is coming from · Make sure you are using the correct mobile phone adapter and that it is securely connected. only one earpiece · Unplug the headset from the audio source, then plug back in making sure they are securely connected. Incoming call ring · Make sure your phone is set to pass the ring tone through to the headset. Check your phone settings and tone not heard make adjustments as needed. through headset Note: This feature may not be available on all phones. Excessive bass · Turn off any audio enhancement features on the audio source. Low volume/poor · Turn off any "sound checker" or other audio signal altering features on the audio source. audio · Make sure ear tips and headset nozzles are clear of any debris or wax build-up. Microphone is not · Make sure you are using the correct mobile phone adapter and that it is securely connected. picking-up sound · Make sure the microphone is not being blocked or covered. The microphone is located on the back of the Answer/End button (you may notice the small opening for the microphone). Phone not responding · Make sure you are using the correct mobile phone adapter and that it is securely connected. [. . . ] Contact the Bose organization in your country/region (visit Global. Bose. com for contact information in your country/ region) for specific return and shipping instructions. Label and ship the product, freight prepaid, to the address provided by the Bose organization in your country. Place any necessary Return Authorization Number prominently on the outside of the carton. Cartons not bearing a Return Authorization Number, where required, will be refused. · This product contains magnetic material. [. . . ]