These are factory sealed, direct from Innosilicon. Each miner includes a 180 day warranty from Innosilicon, starting from when the miner ships to you.
One C13 power cable (sold separately) carrying 220v power will be required for operation. Power Supply is included.
Miner manufacturers sell their miners well in advance of being manufactured. A "May batch" preorder means the miner you are purchasing will be produced and shipped to you sometime in the month of May 2021. Due to shipping delays, preorder miners are often delivered as long as two weeks after manufacture date.