8ch relay module with optocoupler

HM-R series FSK receiver moduleFEATURESHighly integrated, small sizeHigh sensitivity, low power consumptionFSK technology, suitable for replacing ASK modulesLess interference, longer

2.4GHz transceiver with an embedded baseband protocol engineWorldwide 2.4GHz ISM band operation，Free license to use126 RF channelsHigh air data rate:

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