SM1211E915 is a 2 layer RF module operates at 915MHz band. The SX1211 is a low cost Single chip transceiver operating in the frequency ranges from 902-928MHz. The SX1211 is optimised for very low power consumption (3mA in receiver mode). It incorporates a baseband modem with data rates up to 200kb/s. Data handling features include a sixty four byte FIFO, packet handling, automatic CRC generation and data whitening. Its highly integrated architecture allows for minimum external component count whilst maintaining design flexibility. All major RF communication parameters are programmable and most of them may be dynamically set. It complies with European (ETSI EN 300-220 V2.1.1) and North American (FCC part 15.247 and 15.249) regulatory standards.