Specifications: Battery cell: lg li-ion 18650 Battery voltage: 9-12.6v Capacity: 12v/288wh, 12v/400wh, 12v/510wh, 12v/600wh, 12v/666wh Operation environment: Charge: 0 to 45c Discharge: -10 to 60c Output: Ac output voltage: 100/110/120/220/230/240v ac â±3% Output frequency: 50/60h±0.5hz Output power: 500w (pure sine wave) Peak output power: 1000w Dc 4 x usb port: 5v/2.1a 12v dc port: 12v/15a 4pcs Jump starter: starting current 300-400a at 12v Super portable and lightweight Size: 315*184*131mm 1: portable: Weight only 4.5kg Small size: 315*184*131mm More weight lighter, longer lifespan, safer, environment-friendly and portable than other competitor's lead-acid big heavy one 2: pure sine wave 500w, powerful Better than modified sine wave, cleaner current in your hands it prevents crashes in computers, reduces noises in fans, tv and other devices and it is compatible with more gears 3: high capacity power: High-density lithium-ion battery allows for a more compact build than that of lead-acid power packs from 312wh to 744wh, powerful enough to charge smartphones 50+ hours, off-grid power supply for camping or emergency backup, capable of powering lamps, phones, laptops, tvs and even mini fridges Tne-ups boasts triple output modes: a 12v car socket, an 110v ac outlet and 4 fast-charging usb ports 4: safety guaranteed: Built in lg cell, battery management system (bms) undertakes voltage control, temperature control and more advanced safety operations, ensuring complete protection for you and your devices.