Product Overview: The Anker Powercore Select 20000Mah Power Bank Is A High-Capacity Portable Charger, Ideal For Multiple Device Recharges On The Go. Key Features: ‣ Dual Usb-A Ports For Simultaneous Charging Of Two Devices. ‣ Poweriq And Voltageboost Technology For Optimized Charging Speed. Technical Specifications: ‣ Capacity: 20000Mah For Extended Use. ‣ Compatibility: Usb Powered Devices, Including Smartphones, Tablets, And More.