The Canaan Avalon 1166 Pro 81T Bitcoin Miner is a powerful ASIC mining rig designed for optimal Bitcoin mining performance. With a processing speed of 81,000 GH/s and a power use of 3,400 watts, this miner is efficient and effective at extracting cryptocurrency. The miner is tested and in working condition, making it a reliable choice for Bitcoin mining enthusiasts looking for a high-performance machine. The Canaan brand is known for producing quality mining equipment, and this model is no exception, offering a strong hash algorithm and compatibility with Bitcoin currency.