A communication system for a user having a helmet including earphones and a microphone and including a two-way radio and a microphone-including unit carried by the user and connected to the two-way radio includes a sensor for sensing the presence of the user's head within the helmet. A transmitter associated with the sensor transmits a wireless signal to the microphone-including unit which enables the microphone-including unit to wirelessly receive voice-carrying signals transmitted from the helmet microphone for conductance to the two-way radio and enables the microphone-including unit to wirelessly transmit voice-carrying signals which are received by the microphone-including unit from the two-way radio to the helmet earphones. In addition, helmet-carried componentry permits the user to simultaneously communicate through the two-way radio and a bluetooth enabled cell phone.