... foil package 3.with power 4.usb+record KOTV KT-12SPA popular power with record audio mixerParameter THD:≤0.05%Frequency response ... .5KHz LOW:±70dB100KHz Output power:2X400W(4Ω)The main featuresWith record function USB, SD card input port, with display function. Can ... display directly with USB, the big point is can record the sound source come from mixer into USB.Four group ...