The iLive iSA30B Wireless Indoor/Outdoor Speaker System features a digital 2.4 GHz ISM wireless transmitter. This transmitter provides a transmission distance up to 200 feet with a line of sight and up to 90 feet indoors. The wireless speakers are weather resistant and also include an independent volume setting on each speaker. Stereo line-in 3.5mm jacks are built in to each system for use with external music players such as MP3 players and iPods.
Each system has a power on status LED on the front of each speaker and a pairing/connect button. Each system comes with a built-in AC power cord and requires 6 D batteries (sold separately).