Very portable, does not take up much shop space, can be used almost anywhere with a small generator. We set it up at the dragstrip and dyno tested 10 cars in 2 days. Includes a cooling system for endurance testing.[keeps the hydraulic fluid cool] The computer and software was updated recently. Above Added: Mon November 22, 2021, 4:13 pm ESTA Dyna Pack Series 4000 Hub Dyno. Has wide band O2 sensor. 4 and 5 lug adapters. Also 6 lug Viper adapters. Many spacers and other accessories. Can do up to 1000 HP. Perfect for serious tuning.