[. . . ] Do not use your hearing instruments in areas where there is a danger of explosions (e. g. Turn the hearing instruments off when not in use to preserve the battery. Remove batteries when the instruments are not in use for a prolonged period of time. [. . . ] Via remote control Refer to the remote control user guide. 13 Turning your hearing instrument on and off Power-on delay Your hearing instrument is equipped with a "power-on delay" feature which can be activated by your Hearing Care Professional. This allows you to turn the hearing instrument on with an automatic delay of 6, 12 or 18 seconds, so that you may insert the hearing instrument into your ear without experiencing unpleasant feedback (whistling). 14 Changing the hearing program Changing the hearing program Via push button Press the push button. Via remote control Refer to the remote control user guide. 15 Changing the volume Changing the volume The volume of your hearing instruments is controlled automatically and there is no need to manually adjust it. Should you prefer manual volume control, your Hearing Care Professional can program the hearing instrument for manual adjustment. Via remote control Refer to the remote control user guide. 16 Functionalities Functionalities Your Hearing Care Professional can activate the following functionalities. Automatically adjusts both hearing instruments simultaneously to change the instrument settings, e. g. The performance of the e2e wireless function may be affected by electromagnetic interference ­ e. g. Move away from the source of interference if you experience difficulty. 17 Maintenance and care Maintenance and care Your hearing instruments are highly sensitive systems. Clean instruments regularly to prevent damage to the hearing instruments and to avoid health problems. NOTICE Do not put the hearing instruments in water. Clean your hearing instruments with a soft, dry tissue, as necessary. If the hearing instruments sound distorted or weak ask your Hearing Care Professional to exchange the microphone cover. Place your hearing instruments in a "dry aid kit" with a special moisture-attracting capsule overnight. Ask your Hearing Care Professional for special care sets and further information on how to keep your hearing instruments in good condition. 18 Maintenance and care Domes and receiver molds CAUTION Risk of injury caused by incorrect use of receiver unit and domes/receiver molds. Make sure that the dome/receiver mold is completely attached to the receiver unit. If the dome/receiver mold remains in your ear, have it removed by a medical professional. Insert the receiver unit with the dome/receiver mold carefully and not too deeply into the ear. [. . . ] However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna. Connect the equipment to an outlet on a circuit different from that to which the receiver is connected. [. . . ]