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USB-I2C-SPI-4VI4SRMx-12V-NO-TB
4 signal relay board, 4 wide voltage input, Multi-protocol card with no connectors, to allow for you..
£101.93
USB-I2C-SPI-4VI4SRMx-24V-NO-TB
4 signal relay board, 4 wide voltage input, Multi-protocol card with no connectors, to allow for you..
£108.76
USB4SRMx-NO-TB
Features red & yellow LEDs to indicate transmission & reception of data, 0V & power disc..
£62.83
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