User manual SONY MDR-EX75SL

[. . . ] The sound you hear varies according to your position and the transmitter position. Try finding a position which yields the best sound. The serial number is located at the bottom of the transmitter and inside the battery compartment of the headband. record these numbers in the spaces provided below. [. . . ] Before operating the unit, please read this manual thoroughly and retain it for future reference. some features are: · Cordless system that allows you to listen to a program free from the restriction of a cord. Broad horizontal listening area that gives you superb sound virtually anywhere in the room. The VOL control adjusts the volume level of both channels. The supplied rechargeable battery can be used to power the headphones. The headphones are powered by a rechargeable battery (supplied) or a dry cell battery (not supplied). Before operating the system, check that the operating voltage of your system is identical with the voltage of your local power supply. The CE mark on the unit is valid only for products marketed in the European Union. When the headphones is not to be used for a long period of time, remove the battery to avoid damage caused by battery leakage and subsequent corrosion. When the transmitter is not to be used for a long period of time, disconnect the AC power adaptor from the AC outlet holding the plug. Do not leave the cordless stereo headphones system in a location subject to direct sunlight, heat or moisture. Be sure to bring the headphones and the transmitter to the Sony dealer when requiring repair work. Using a dry cell battery Insert the dry cell battery into the headphone battery compartment the same as when inserting the rechargeable battery. When the ear pads become dirty or damaged, consult your nearest Sony dealer and replace them as illustrated below. Replace the battery with a new one when the POWER indicator on the headphones dims, and a hissing noise increases. About 24 hours is required to fully charge the rechargeable battery. Once fully charged, the battery provides about 35 hours of operation. One hour charging of the rechargeable battery enables about 1 hours and 30 minutes of operation. This system is designed to charge only the supplied rechargeable battery for safety. This system cannot charge other batteries even if they have the same shape. Since little electric current is used for charging, there is no need to worry about overcharging. As this system is not affected by the memory effect of the Ni-Cd battery, recharging the supplied battery before it is completely discharged is not a problem. [. . . ] As this system is not affected by the memory effect of the Ni-Cd battery, recharging the supplied battery before it is completely discharged is not a problem. When the transmitter power is turned on, the battery charger does not operate. Power source DC IN 9V jack accepts power supplied from the AC power adaptor for use on the following voltages: Operating voltage 120 V AC, 60 Hz 230 ­ 240 V AC, 50 Hz 220 ­ 230V AC, 50 Hz 220 ­ 230 V AC, 50/60 Hz or 120 V AC, 60 Hz 110 ­ 120 V/220 ­ 240 V AC, 50/60 Hz Recharge the supplied battery when the POWER indicator on headphones dims, and hissing or noise occurs. If the POWER indicator dims even after full charging, the battery is completely dead. [. . . ]