1. Antminer S19 models give great output. This is not the PRO version. Just a standard S19 from Bitmain. 2.This miner processes 90 Th/s and weighs about 32 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.