The Rapoo Powerbank has Dual USB(2.1A) output ports, these output ports let you quickly charge two devices simultaneously. With a simple design, matching large screen mobile phone, this power bank with exquisite craftsmanship gives you a great experience. A class lithium-ion battery cells ensure safety use. You can use this product without any worries. Ten layers of protection effectively ensure the security of power supply, smartphones, and tablets. You can always easily carry this Powerbank along with you and do not encounter problems shutting down your digital devices.