Those USB block erupters will get you absolutely nowhere. They don't have a high enough hash rate to even come close to competing with other SHA-256 miners. If you are a novice and are just getting into it I would recommend this as a bare minimum: http://www.ebay.com/itm/Bitmain-Antminer-S3-PLUS-453-GH-s-Bitcoin-BTC-ASIC-Miner-/371304797293?hash=item56737d946d:g:aaoAAOSwqu9VLEuI#viTabs_0 . Don't make the mistake I made where I bought a gridseed ASIC dual miner. I'll never get return on investment with it. Happy mining

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-CryptoMiningGuy123