[. . . ] To prevent fire or shock hazard, do not place objects filled with liquids, such as vases, on the apparatus. Operate the unit on the power source listed in the "Specifications". [. . . ] Operate the unit on the power source listed in the "Specifications". For AC operation, check that the unit's operating voltage is identical with your local power supply and use the supplied AC power cord; do not use any other type. â· The unit is not disconnected from the AC power source (mains) as long as it is connected to the wall outlet, even if the unit itself has been turned off. Do not leave the unit in a location near heat sources, or in a place subject to direct sunlight, excessive dust, or mechanical shock. â· Should any solid object or liquid fall into the unit, disconnect the AC power cord or remove the batteries, and have the unit checked by qualified personnel before operating it any further. â· Do not use different types of batteries at the same time. â· When you replace the batteries, replace all with new ones. â· When the unit is not being used for a long period of time, remove the batteries to avoid damage from battery leakage and corrosion. â· If a battery leakage occurs, wipe the battery compartment with a soft cloth before inserting new ones. With the supplied AC power cord: 220 - 230 V AC, 50 Hz 240 V AC, 50Hz (Australian model) With four R6 (size AA) batteries: 6V DC When the sound becomes weak or distorted, replace all the batteries with new ones. [. . . ] â· When the unit is not being used for a long period of time, remove the batteries to avoid damage from battery leakage and corrosion. â· If a battery leakage occurs, wipe the battery compartment with a soft cloth before inserting new ones. [. . . ]