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The OBS421x-i4 from u-blox AG is a RF Module with Frequency 2.4 GHz, Supply Voltage 3.0 to 6.0 VDC, Output Power 11 to 13 dBm, Data Rate 1.3 Mbps, Current Transmitting 0.6 to 44 mA. More details for OBS421x-i4 can be seen below.
Compact and Powerful Bluetooth Smart SoC
2.4 GHz Random Phase Multiple Access (RPMA) Module
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