Goal Zero Yeti 400 Portable Power Station, 400Wh Battery Powered Generator Alternative with 12V, AC and USB Outputs 396Wh lead acid battery portable power station can power up to 7 devices at once (33Ah @ 12V) Continuous 300W, 600W surge pure-sine wave inverter, 2.1A USB ports, 120W 12V ports Charge phones, tablets, laptops, cameras, and most small devices. Backup power for small appliances, lights, and more Recharges from AC, 12V or solar panels (sold separately). Gas-free generator alternative with no noise, no fumes, no maintenance Chainable with other 33Ah lead acid batteries for longer runtimes Designed and engineered by power station experts with a US-based customer service center