A leatherette cover adds a touch of sophistication to the UL Listed Abruzzo 4,000 mAh Power Bank, which features a Grade A lithium polymer battery to provide your smartphone with reliable, on-the-go power. Power bank comes with one USB-to-Micro-USB connecting cable, which you can use to recharge the battery backup plus additional devices with Micro-USB inputs, including most Android smartphones. Power banks are permitted in carry-on luggage only, and at the discretion of TSA agents. Please charge power bank before initial use.