Open the compartment and refer to the image inside to install the batteries. Pay close attention to the negative (–) and positive (+) ends of the battery to be sure they are placed correctly. Incorrect installation of batteries can damage the keyboard or cause an electrical hazard. Note: If the batteries start to wear out, the keyboard’s sound may deteriorate. If this happens, install a new set of batteries. If you are not going to play for a long time, remove the batteries from the keyboard. Do