The Sharper Image Wireless Indoor/Outdoor Speaker with Audio Transmitter Receives wireless signal via transmitter for use with MP3 players, CD players, personal computers, stereo recievers, TV's and more Speaker delivers 10 watts of rich, dynamic sound from twin 1.25 inch tweeters and one 4 inch subwoofer 180 degree pivoting speaker head for multi directional sound Optional line-in for direct connection of portable audio devices 100 ft wireless transmission