8 ENGLISH Installing the lithium coin battery(CR2025)Before using the remote controller:• Aim the remote controller directly at theremote sensor on the monitor. Make surethere is no obstacle in between.• Do not expose the remote sensor to stronglight (direct sunlight or artificial lighting).Warning:• Do not install any battery other thanCR2025 or its equivalent; otherwise, itmay explode.• Store the battery in a place where childrencannot reach to avoid risk of accident.• To prevent the battery from over-heating,cracking, or starting a fire:– Do not recharge, short, disassemble, orheat the battery or dispose of it in a fire.– Do not leave the battery with othermetallic materials.– Do not poke the battery with tweezers orsimilar tools.– Wrap the battery with tape and insulatewhen throwing away or saving it.Remote controller — RM-RK230Remote sensorMain elements and featuresMONITOR CONTROL1 (standby/on) button• Turns on the power if pressed.• Turns off the power if pressed and held.2 MODE button• Selects the playback source.3 ASPECT button• Changes the aspect ratio of the screen.4 MENU button• Calls up the menu, then selects theadjustable menu items.5 / buttons• Adjust the level of the selected item orselect an appropriate setting for selecteditem.MENU