Ultra-portable stereo and protective case for your iPod iPhone and MP3 Rechargeable lithium-ion battery and plug-in charger included. Extra features: Heaphone jack combination headphone jack/auxillary and mic-in. Daisy-chain feature. Additional accessories: Custom travel bag two carry straps. Custom fits and protects iPods iPhone and most MP3's. Can also be used as a high power external stereo speaker system for any device with a 3.5mm connection: iPad cell phones laptops Kindle electric guitar gaming systems etc.