1.Product:Car amplifier
2.Speaker impedance :8-16ohm
3.SNR(Signal/Noise Ratio):100db
4.Input power :12V DC 5A -AC 220V
5.Input impedance:47K
6.Frequency :20Hz-20KHz
7.Input sensity:0.25mV-100mV
When you choose the amplifer add SD card then we will send the amplifer with sd card for you ,otherwise the sd card is not included !!!