The device could be implanted under the scalp to be totally hidden and avoid wire breakage, which occurs if you put it in the chest and you try to move your neck around.
该设备可以植入头皮下， 完全隐藏，和避免断线 因为如果不这样，当你把它放在胸部，或者是扭一下脖子他可能就会断线。