Soundcast OutCast Wireless Speaker with iCast Transmitter - Each (White) Note: This system works exclusively with the MultiCast 3.4 line of products. It will not work with 2 zone systems 100 Watt, 2.4GHz wireless stereo speaker system Includes iCast 3.4 MultiCast transmitter with built-in charging iPod dock, Power Supply, 24V rechargeable battery, power cord Weather resistant system - not waterproof works with 3G and up iPods/iPhones