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- cojxu si4438 rf module 433 470mhz spi 2 5km distance 20dbm half duplex smd integrated transceiver receiver e30 400m20s 4438
cojxu si4438 rf module 433 470mhz spi 2 5km distance 20dbm half duplex smd integrated transceiver receiver e30 400m20s 4438