Stadium MusicBox Rechargeable Party SpeakerThe Stadium Musicbox is a versatile feature packed party machine. Your party is not complete without party lights and great tunes pumping. Karaoke all night long with the microphone input. Don't forget you can do all this on it's inbuilt rechargeable battery which can also operate on a power bank^^ when you start runing out of juice. The Stadium Musicbox can charge with any of your existing USB chargers* (2. 1A recommended).*USB charger sold