The NM-usb-chain is a NMMiner Offical development board. At first glance, you may think it's just an ordinary ammeter, but in fact it's also a lottery ticket. It can not only provice the precise current measurement, but also achieve the same high Hashrate 117KH/s as other ESP32-S3 devices. Most importantly, the nm-usb-chain includes a male USB-A port and a female USB-A port. Multiple usb-chains can be connected in series to form a lottery chain, which is really interesting. Of course, this is not all of the nm-usb-chain functions. Daily work and life current monitoring. Lottery when charging your phone. Double your lottery device hashrate without any power supply device added. Such as usb-chain + T190, usb-chain + LILYGO T Dongle S3, etc. Colour:random, don't accept the specified color Material:plastic Due to different product batches, the appearance may vary, which does not affect the use Package Contents: 1 * NMMiner 1 * Adapter (appearance may vary depending on batch) 1 * NerdMiner(appearance may vary depending on batch)