Bitmain Antminer S4 2TH/s Bitcoin Miner-US Seller - sha256 - Pay BTC / Free Ship

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*****Please contact me prior to purchase for a direct pay discount & free shipping***** The AntMiner S4 is the fourth generation Bitcoin mining rig by Bitmain. It uses the state of the art BM1382 chip powered by the 28nm tech process with ultra-low power consumption. Power efficiency progress is reflected from the S1 to the S4 and is our focus to improve your investment and save on electricity bills. The AntMiner S4 is built into 3U size box, although its hashrate is twice that of the S2. The S4's design is hugely improved from S2's experiences, using less hash blades and adjusting the space structure in each box to bring a light and portable model. It will be very convenient to deploy. Excellent condition, Latest firmware installed. I will include a heavy-duty AC power cord (note: the manufacturer did not originally include a power cable). Performance: Hashes reliably at over 2100GH/s (2.1TH/s) with a low hardware error rate of ~0.0002%. (See screenshot of miner status) unit ran mostly at 1.2 TH for power savings.