Sharper Image SBT2002BK 2.1 Computer Speakers with Subwoofer, Bluetooth, LED Ambient Light (Black) Tri-speaker system including subwoofer with Separate bass & treble control. Can be used as computer speakers, or as living room streaming speakers. Integrated wireless Bluetooth technology or auxiliary 3.5 mm jack for wired use Universal compatible with any Bluetooth device ,working with iPhone/iPad or android phones/tablets Blue ambient LED light effects. Plug speaker directly to wall outlet 2.1 channel stereo with retro analog volume control for better volume control