So, punching the above number into the Hashrate Index calculator:

https://hashrateindex.com/tools/calculator

This will generate $0.38 per day, at current hashrate and bitcoin difficulty.  That's ~$140 / year.

Even if you get free electricity, this will take about 4 years to return the $500 you paid for it (again, at today's BTC/USD and bitcoin difficulty)

Don't be an idiot.

BTCMiner

247bf84fda

2-3.8 TH/s of SHA256 performance per miner (+/- 5%)
125 Watts in ECO mode, and 200 Watts in TURBO * +/- 10%

bitcoin

A $499 Mini Bitcoin Miner?! How To Mine BTC Profitably CHEAP!

TheWildHustle

Assuming this is it:

> 2-3.8 TH/s of SHA256 performance per miner (+/- 5%)
> 125 Watts in ECO mode, and 200 Watts in TURBO * +/- 10%

https://shop.futurebit.io/products/pre-order-apollo-btc-a-bitcoin-asic-miner-and-desktop-class-computer-running-a-full-node-and-much-more-batch-1-ships-in-late-april-to-may