With this charging dock, you'll always be able to listen to your favorite music without the Bose SoundLink Revolve speaker running out of battery. Place the speaker on the dock at home and connect it to your own micro USB charger so it automatically recharges. Your music just keeps on playing while it's charging, so you'll always have a fully charged speaker to take with you when you go out. The charging dock is only suitable for use with the Bose SoundLink Revolve. Note: There's no USB charging cable included.