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E30-400M30S(4438) Half-duplex integrates transceiver and receiver SI4438 chip wireless module [Chip solution]:SI4438 [Carrier frequency]:425~525MHz [Transmit power]:30dBm [Communication distance]:5.6km [Product size]:38.5*24mm [Product weight]:5.3±0.1g [Introduction]:E30-400M30S(4438) is a hardware module (SPI) based on...