1. Rechargeable. 2. Stable and durable. 3. Portable and lightweight. 4. Includes retractable handle and universal wheels. 5. Composed of Grade-A lithium iron phosphate battery. 6. With BMS to guarantee high reliability safety. 7. With inside 1500W inverter runs on pure sine wave power. 8. With display screen to show SOC, AC/DC voltage. 9. Can be customized according to customer's demand.