1.The Antminer S19J Pro is the gold standard when it comes to mining. Crazy efficient and reliable, these will last for years to come. 2.This miner has 3,068 Watts, processes 104Th/s and weighs about 20 pounds. 3.If self-hosting, you must have a 220v outlet, as a small step down transformer will not work.If self-hosting, please be aware that these machines are very loud and get very hot. They require significant ventilation, especially the newer models. 4.All new miners come with a 12-month manufacturer's warranty. 5.Shipped from the US.