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Put them in like this: + PROG PROG + VOL VOL 9-0 SHIFT MENU OK TIP • Remember to replace the batteries at least once a year. • Don’t leave the batteries out for longer than one hour, otherwise you will need to set-up the SBC RU510 again. KEYS & FUNCTIONS Power: to switch TV on and off. Mute: to switch the TV sound on and off. Channel Up/Down: to select next / previous channel. Volume Up/Down: to control the TV volume. Number Keys: for direct channel selection and other functions. To switch betwe