Speaker Used for iPod, MP3/4 players, computers, CD players and mobile phones Speaker Used for iPod, MP3/4 players, computers, CD players and mobile phonesImpendance: 4ohmOutput power: 2 x 2WBattery: 4 x AAFrequency: 20-20kHzMeasurement: (dia.)205 x 98 x 85mmSpeaker material: ABS Portable mini speaker with high and clear sound