... the volume,Smart esign,entertainment to enjoy life.2, Built-in LINE-IN the players, support IPOD IPHONE ,can play MP3, WMA ... surround soundABS PC material: high polish painting, prefer music float in the skySpecification:Power: left and right channel 4W x 2 ... volume 15 x 1 (4Ω)Input sensitivity: ≤400mVSNR (signal-to-noise ratio): ≥82dBDS distortion: ≤0.7%Frequency responsible: 60Hz to 20kHzSpeaker ...