There is provided a wearable device operable to determine an orientation of the wearable device, when placed on a body. The wearable device comprises a plurality of electrode pairs located at different positions. At least two of the plurality of electrode pairs are configured to receive a signal transmitted from a reference device using the body as a transmission medium. The wearable device also comprises a processor configured to determine a property associated with the signal received at the at least two electrode pairs, compare the determined property to a corresponding reference property and determine, from the comparison, whether the wearable device is in the predetermined orientation on the body. The determined property is indicative of an orientation of the wearable device with respect to the reference device and the corresponding reference property is indicative of a predetermined orientation for the wearable device on the body.
