ARCTIC Power Bank 4000 is a portable power bank with an integrated 4000mAh Lithium-Polymer rechargeable battery with 2.0 Amps of output ready to charge up your smartphones and tablets. Roughly the size of an iPhone 5, ARCTIC Power Bank 4000 has an elegant yet modern brushed aluminum surface and with a thickness of only 0.4", you can bring it just about everywhere you go. Keeping your important mobile devices charged while enjoying the envious looks from bystanders! ARCTIC Power Bank 4000 is not just for your smartphones and tablets; it can charge just about any USB-powered devices, including Bluetooth headsets and wireless speakers as well! Smart charge level indicator keeps you informed how much charge power is left so you can always keep your mobile devices charged when needed. An intelligent charge controller extends the battery life and a protection IC protects your mobile devices from short-circuit, over-voltage/current. ARCTIC Power Bank 4000 features a 3-year standby time so it is always ready when you need the extra power. ARCTIC Power Bank 4000 comes with a 2-year limited warranty and is available in 4 different vivid colors (Black, Silver, Blue and Pink) to fit your personal style. Please contact ARCTIC directly for services at arctic.usatarctic.ac.