Add some technological swag to your Prom or Homecoming favor bags, like this Flip Key Chain Power Bank. It's a convenient item to carry around every day! The flip power bank features a split ring on a chain and 600 mAh battery dual lightning and android connectors (one on each side). Customize the item by adding a one-color imprint to one side of the power bank. Measures 1.6" x 1.6" x .4".