Dual-port input and output .The power bank comes with two input ports, micro-USB and USB-C, meeting your need to charge with either cable. .The two USB-A output ports support charging 2 devices simultaneously. Two-way 18W fast charge .To fully charge the power bank, it only takes 4 hours at the Max 18W power. .The power bank supports Max 18W power for single-port output. Built with Safety .The lithium polymer battery with high energy density ensures safety while dealing with unusual situations, such as overcharge, high temperature, and short cut.