Top features: - Charge your portable USB devices with ease - LED indicators display the remaining battery power Charge your portable USB devices with ease The Keep Calm and Re-Charge Portable Power Bank features a 2.1 Amp USB port to quickly charge your portable devices. Ideal for smartphones and tablets, it ensures that you can keep your devices powered up while on the move. LED indicators display the remaining battery power With four LED battery lights, you can easily monitor how much charge is remaining within the power bank. You can charge your devices confidently with safe circuit protection preventing damage to your smartphone or tablet.