User manual ROLAND BC-13

[. . . ] Six AA alkaline batteries allow approximately 15 hours of operation. A footswitch (sold separately) can be used to turn mute or delay/reverb on and off. < Guitar/instrument channel> In addition to accepting input from a guitar or electronic musical instrument, this channel accommodates microphone input as well. Eight types of COSM amp For use when connecting an electric guitar, a variety of famous guitar amp models, including "JC, " are provided. [. . . ] The AC adaptor will begin to generate heat after long hours of consecutive use. This is normal, and is not a cause for concern. The use of an AC adaptor is recommended as the unit's power consumption is relatively high. Should you prefer to use batteries, please use the alkaline type. For everyday cleaning wipe the unit with a soft, dry cloth or one that has been slightly dampened with water. To remove stubborn dirt, use a cloth impregnated with a mild, non-abrasive detergent. Afterwards, be sure to wipe the unit thoroughly with a soft, dry cloth. When installing or replacing batteries, always turn off the power on this unit and disconnect any other devices you may have connected. This way, you can prevent malfunction and/or damage to speakers or other devices. Never use benzine, thinners, alcohol or solvents of any kind, to avoid the possibility of discoloration and/or deformation. Before connecting this unit to other devices, turn off the power to all units. When moved from one location to another where the temperature and/or humidity is very different, water droplets (condensation) may form inside the unit. Damage or malfunction may result if you attempt to use the unit in this condition. Therefore, before using the unit, you must allow it to stand for several hours, until the condensation has completely evaporated. * When turning the unit upside-down, handle with care to avoid dropping it, or allowing it to fall or tip over. Do not allow rubber, vinyl, or similar materials to remain on the unit for long periods of time. Such objects can discolor or otherwise harmfully affect the finish. Here you can connect your electric guitar, acoustic guitar, electronic instrument such as a keyboard, or mic. Push this to choose the input level that's appropriate for the device you've connected (mic/line). When this is in the Line position, you'll be able to use an acoustic guitar or keyboard. The switch lights in red when the tuner function is on; the switch is unlit when the tuner is off. You can select from the following eight types. [. . . ] * If there are batteries in the unit while an AC adaptor is being used, normal operation will continue should the line voltage be interrupted (power blackout or power cord disconnection). * When operating on battery power only, the unit's indicator will become dim when battery power gets too low. * This unit is equipped with a protection circuit. A brief interval (a few seconds) after power up is required before the unit will operate normally. [. . . ]