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SainSmart USB 4 Channel DC 12V Relay Module Automation for Arduino Raspberry Pi DSP AVR PIC ARM auspowers_batchthree 9640G and 9650 IP Phones Style:Crimped Wire Wheel 9640G and 9650 IP Phones GXP2124 Schools & Community Programs Overview: This USB Relay Controller Data Acquisition Module allows computer controlled switching of external devices as well as full bi directional communication with the external world (ideal for Data Acquisition applications) using the USB port of your computer Windows 98
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