The CWS900A allows a sensor with a special connector to be used in a wireless sensor network; the special connector is available as an option for a large variety of sensors. (See the Compatibility information on the web page.) The CWS900A contains an internal 922 MHz spread-spectrum radio that transmits data to the CWB100A Wireless Base Station or to another wireless sensor. The frequency of the internal radio is commonly used in the Australia and New Zealand.