The RFM65CW is a low cost receiver module capable of operation in 315,433,868 and 915 MHz license-free ISM (Industry Scientific and Medical) frequency bands. All major RF communication parameters are programmable and most of them can be dynamically set. The RFM65CW offers the unique advantage of programmable narrow-band and wide-band communication modes. The RFM65CW is optimized for low power consumption while offering high sensitivity and channelized operation. Compliance ETSI and FCC regulations. In order to better use RFM65CW modules, this specification also involves a large number of the parameters and functions of its core chip RF65's, including those IC pins which are not leaded out. All of these can help customers gain a better understanding of the performance of RFM65CW modules, and enhance the application skills