This is a used Bitmain Antminer S19 with a hash rate of 95 TH/s, designed to mine Bitcoin and other SHA-256 algorithm cryptocurrencies. It is intended for individual or industrial miners seeking a lower-cost pre-owned ASIC miner for proof-of-work mining operations.
In Endemine hosting at $0.08/kWh, a typical 3,500 W miner costs about $204/month in power. At home on €0.30/kWh it would be roughly €766/month.