2.4GHZ WIRELESS STEREO SPEAKERINDOOR/OUTDOOR SPEAK2.4GHz Frequency Hopping Spread Spectrum (FHSS) digital transmissionDual power transmitter utilizes either AC power or batteries (4 AA batteries - not included)32-channel scan-tuning between transmitter and receiver5" 2-way 20-watt weather resistant speaker powered by 6-D batteries (not included) or by AC adapterMood light effectSpeaker and remote are water and UV resistantSupports stereo audio up to 6 speakers (additional speakers purchased separately)Operating distance up to approximately 150' in open areas (less through walls and other obstructions)Auto volume level controlIncludes RF transmitter, remote control, AC adapter for transmitter, AC adapter for speaker and RCA to RCA cable