Wearable device and method of controlling the same

A wearable device comprising:

• a clock generator configured to generate a clock signal;
• a signal generator configured to generate a first synchronization signal based on the clock signal;
• an electrode configured to transmit and receive an electrical signal through a body while contacting the body;
• a switch configured to connect the signal generator and the electrode or block a connection between the signal generator and the electrode;
• and
• at least one processor configured to:
• control the switch to connect the signal generator and the electrode for transmitting the first synchronization signal generated in the signal generator to the electrode in a master mode, and
• control the switch to block the connection between the signal generator and the electrode in a slave mode,
• wherein the at least one processor is further configured to adjust at least one of a frequency or a phase of the clock signal based on a second synchronization signal received through the electrode from another wearable device worn on the body.