V7 Professional High Capacity Powerbank 10,000 mAh Lithium Ion Smartcharge Technology with two USB-ports 4.2A (2.1A per port) black Dual USB ports with 4.2A total output power (2.1A and 2.1A) allow for simultaneous charging of your devices wherever you are Rubberized, non-slip outer coating Built-in smart IC maximizes charging efficiency by detecting optimal charge current 4-Stage LED charge indicator allows you to monitor power consumption and remaining balance No hassle, worry free 1 year manufacturers warranty. Join the millions who trust and rely on the V7 brand