An arm sling apparatus includes cooperating suspension system and support frame wherein the weight of a user’s arm may be transferred from the shoulder to the torso. The BCP is disposed over a patterned neutral layer made from a random copolymer. The printed circuit board has a front surface formed with a generally-circular island-shaped electrode surrounded by a front surface-side ground pattern in a spaced-apart relation thereto, and a back surface formed with a strip line surrounded by a back surface-side ground pattern in spaced-apart relation thereto. The communication unit 255 transmits to or receives data from each MC 300 and the like.