This systems comprises a lithium 4000mAh, USB output 5V 1A, DC output 3.2, Adapter input 5v, average usage time of 8 to 10 hours. 5 to 6 years of battery. Power bank plus emergency chandelier light function. it also has a built in emergency 3W light power behind the solar panel. it comes with two 1W bulbs, the usage time for a single bulb is 20hours while 2 bulbs lasts 10 hours, the emergengy light last 7-28 hours.This systems comprises a lithium 5000mAh, USB output 5V 1A, DC output 3.2, Adapter input 5v, average usage time of 8 to 10 hours. 5 to 6 years of battery. Power bank plus emergency chandelier light function. it also has a built in emergency 3W light power behind the solar panel. it comes with two 1W bulbs, the emergengy light last hours.fast charge overcharge protection fast charge5V usb portBATTERY 4000Mah battery can be charged by either the solar panel or the power adapter, the red light indicates the product is charging and the grren light indicates the product is fully charged. it takes 8 hours to charge fully.USB it has a 5V USB Output port for power your other devices.