The GREATTHINK 15,000mAh Wireless Power Bank is a portable charger that lets you charge your devices on the go without cables. The 15,000mAh capacity provides multiple charges for your smartphone, tablet, or other device. The wireless charging feature allows you to simply place your Qi-enabled device on the power bank to start charging. Plus, it comes with two USB ports for charging multiple devices at the same time. The compact and lightweight design makes it easy to carry it wherever you go. All in all, the GREATTHINK 15,000mAh Wireless Power Bank is a convenient and reliable power bank that ensures you stay charged wherever you go.