Surface Acoustic Wave (SAW) technology is commonly used in the electronic circuitry of everyday appliances like mobile phones and televisions, where the waves are used to filter frequencies. But RFID (Radio Frequency Identification) developer AirGATE Technologies, a wholly owned subsidiary of the X-Change Corporation (OTC BB: XCHC), believes SAW technology may provide a way to solve deployment problems facing companies that have been unsuccessful in deploying common RFID technology to identify, track and catalog tagged items in “harsh” environments.