The BRS-430 comes equipped with an analog quartz clock on the front of the unit.
To change the clock battery or adjust the time, use the provided tool to remove the clock face from the unit. The tool will fit into a notch located directly under the frame of the clock (6 o'clock.) Use the tool to safely pry the clock face out of the speaker cabinet, making sure not to scratch the bamboo panel. Once the clock is removed, you can adjust the time by pulling out/turning the gear located on the right side of the clock face (3 o'clock.)
To change the battery use the provided tool to pry the backing off the clock to reveal the battery compartment and replace it. The clock uses a size 377 watch battery.