A system and method of transmitting packets from a wireless device is provided. Assemblies for connecting the club head and shaft may include: a shaft adapter, a shaft retainer, and a club head having an interior chamber. The adjustability of the needle electrodes allows the depth that the needle electrodes penetrate through tissue to be adjusted. An interrupt factor is branched immediately before an interrupt controller for the microcomputer and used as a transition input. Methods of use of the fluids are also disclosed.