hi-fi USB speaker, PC portable mini speaker 1.Quality, innovative and portable 2.USB power supply 3.Line-in Mini portable amplifier speaker, PC portable mini speaker box, Technical parameterOutput power:3.0W, 4ΩSNR:>=80dBFrequency response:60Hz—20 KHzTHD:<0.5 %Battery:3.7V/1000MAHCharging voltage:DC 5.0V/500MADimension:Φ40*46MM(A),Φ51*47MM(B),Φ62*58MM (C) Selling points1.Support TF card display2. ...