1.Technological parameters:1.Uses: industrial standard aluminum material 2.Firm, small and easy to carry, compact size and high capacity, over most of the digital 5V devices, intelligent protection circuit design provides over-charge, over discharge and short circuit protection 2.Rated power: 3000 and 4000mAh 3.Output voltage: 5V 4.LED flashlight: yes 5.USB interfaces: 1 6.Max electric current: 1A 7.Battery type: Li-polymer battery 8.Materials: PC plastic board 9.Colors: Pink, White, Green, Blue (OEM:option) 10.Dimensions: 122*56*10mm 11.Accessories: DC input adapter, phone charger adapter, USB cable and user manual