Systems and methods for assigning unique network identifiers in a packet-switched wired network and methods for communicating with a network device in a packet-switched wired network are provided. The handheld device is removable from the cradle to reveal a primary display that communicates specific information regarding the conditions of the system and individual tires. Modification of the microwave signal after it passes through the surrounding region is measured and used to infer one or more properties of the test material. The north bridge assists the south bridge in obtaining and maintaining the pre-fetched read data for high efficiency and accuracy of read caching of the south bridge. At least two massage nodes are operably connected to the rocker arm to form a massage surface, wherein the massage nodes are moved asynchronously toward and away from the massage head portion by each of the connecting rods to provide a percussive massage effect.