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Description: This is USB controlled relay opto-isolated board with 16 SPDT relays. You can use it for simple ON/OFF switching electrical devices - home lights, DC motors, solenoids and others. It can help you building projects like robotics and home automation. Specifications: Maximum load: 10A/250V Power supply: DC 7V~38V LED for each relay output Power LED USB LED Package Contents: 1x 16-Channel USB Relay Module