This ASIC USB miner, manufacturers by ASICMiner, will allow you to mine Bitcoins at a rate of 333MH/s with a power usage of 2.5WA
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Running this device at the current difficulty is estimated to earn 0 BTC per day. Note that this is an estimate only and Bitcoin Co. Ltd. make no claim or guarantee as to how many bitcoins you will actually earn while mining. You can view detailed earning calculations here
All mining devices are used in Bitcoin Co. Ltd. mining operation while awaiting sale.
USB miners come with a 2 week return policy from the date of purchase; non-functional miners can be returned for a refund.