The Ion iPA03 Block Rocker Portable Speaker System is the perfect portable speaker system for travelling musicians, entertainers and event coordinators. The Ion iPA03 Block Rocker Portable Speaker System has a long-lasting rechargeable battery, sturdy construction and portable design; make certain the BLOCK ROCKER can be taken anywhere and everywhere. It features a high-efficiency amplifier with four inputs for connecting microphones, instruments, CD/MP3 players, and a universal dock for iPod. This powerhouse sound system makes every mobile event a success. High-output powered mountable 2-way speaker system Built-in rechargeable battery with level indicator lasts over 12 hours Outputs high-fidelity sound to over 150 feet Enhanced bass output creates a full, rich sound Professional quality microphone included Heavy-duty aluminium construction Two-wheel system with retractable handle for easy portability 1-3/8 PA speaker stand mountable Four inputs with independent level controls for iPod: Integrated Universal Dock for iPod, iPod Mini, or iPod Nano Microphone: Balanced XLR or 1/4 microphone 1/4 jack for guitar, keyboard, other instrument, or second microphone CD/MP3 Player: RCA line level input for CD player, MP3 player, or other audio device