Power:20W Surround Sound Channel Configuration:2 Function:Hi Res Audio Plug Type:USB Control Method:Button Control Speaker Battery Average Playtime:5 to 8H Compatible Devices:Music Players Certification:FCC Color:Black Type:Wireless Speakers Material:ABS Interface:3.5mm Batteries Included:Yes Power Supply:Battery Powered(Rechargeable Battery) Connection Method:Bluetooth Audio Output Mode:Surround Sound