NE555 Adjustable Frequency Pulse Generator Module

HM-TRP Series 100mWTransceiver modulesFeatures
 Low cost, high performance , high reliability
 FSK modulation, 2-way half –duplex communication, strong anti-interfere
 433/470/868/915MHz

single chip, low power, multi-channel FSK transceiver designed for use in applications requiring FCC or ETSI conformance for unlicensed use