Vision Master T190

Bitcoin solo miner with 1.9 inch display. Allows to mine Bitcoin from small diff pools. It build on top of ESP32 proc series. All list of pools can be found on official GitHub page
This miner costs nearly 25$ with additional interface wires for programming and processor radiator. One unit hads 117 H/r and USB-C interface. Soft may be easily upgraded from official page. If your miner can solve 1 block it will give you 3 BTC at once. Also possible to try it with other coins Set up is easy and clear. It can be done via wi-fi, or usb interface Using this miner not guaranties you that you'll get BTC it's mostly like a lottery.Good luck!