ER3071L Features Hi-Fi stereo sound effect High performance and suitable for cars Simple to install Compact size for ease of carrying General Specs Brand & Model A6 Power supply 8-ISV DC Output 8V(Max) T.H.D 0.01% Frequency response 10Hz±1dB S/N >90dB Stereo separation >-60dB Treble bass range ±15dB Input impendence 20K ohms Input sensitivity 0-2V RMS  Package Details Weight: 238.61 g Size: 14.8*10*4.5 cm