ENGLISHTo answer or end a call, press themultifunction key. To reject the call,press and hold the multifunction keyfor about 2 seconds.To adjust the volume, use the volumekeys on your mobile device.To switch the call between theheadset and a compatible device,press and hold the multifunction keyfor about 2 seconds.ResetTo reset the headset if it stopsfunctioning, although it is charged,plug the headset into a charger.Battery informationYour device is powered by a rechargeablebattery. The battery can be charged anddischarged hundreds of times, but it willeventually wear out. Recharge yourbattery only with Nokia approvedchargers designated for this device.Unplug the charger from the electricalplug and the device when not in use. Donot leave a fully charged batteryconnected to a charger, sinceovercharging may shorten its lifetime. Ifleft unused, a fully charged battery willlose its charge over time.Never use any charger that is damaged.Leaving the device in hot or cold places,such as in a closed car in summer orwinter conditions, will reduce thecapacity and lifetime of the battery.Always try to keep the battery between15°C and 25°C (59°F and 77°F). A devicewith a hot or cold battery may not worktemporarily, even when the battery isfully charged. Battery performance isparticularly limited in temperatures wellbelow freezing.