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5V 7 28V 8 Channels Bluetooth Relay Module Development Board DT266 Digital Clamp Multimeter The onboard CH340 USB to UART converter The onboard CH340 USB to UART converter automatically provides serial communication for firmware upload and debugging output and mount your CPU cooler following manufacturer specifications and provides reference programs under the Arduino development environment The ESP8266 eight way relay development board is equipped with an ESP 12F WiFi module and supports DC7 28V 5V power supply
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