1.Bluetooth 4.0 2.Distortion¡ê¼0.5% 3.Snr¡y80db 4.Rated impedance:16ohm 5.Channel separation¡y50db 6.Speaker:3w/4|¸ 7.Frequency range:100hz--20khz 8.Battery:3.7v/500ma 9.Working voltage:3.7- 4.2v 10.Color:red 11.Function:support line in Size¡êo49*43*43mm