EcoFlow Portable Stand allows you to stack one DELTA Pro Ultra Inverter and 5 Batteries. This stand is engineered to support and transport EcoFlow DELTA Pro Ultra with ease. However, for long-time use, do not move the whole set of products if you connect the inverter to three or more batteries and lock casters by flicking the brake down, so that the product can&';t be moved anymore. Specifications: Dimensions: 2.2x;1.2 ft (666x;370 mm)