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.<br> 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.<br> Daily work and life current monitoring.<br> Lottery when charging your phone.<br> Double your lottery device hashrate without any power supply device added. Such as usb-chain + T190, usb-chain + T Dongle S3, etc.<br> Colour:random, don't accept the specified color<br> Material:plastic<br> Due to different product batches, the appearance , which does not affect the use<br> Package Contents:<br> 1 * NMMiner<br> 1 * Adapter (appearance depending on batch)<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.