... Compression Dual Stream for Recording and Network transmit Support Hard disk and SD card recording, USB and Network Back ModelJY- ... 30 fpsRecord band rate16K~2M adjustable,Customizable (unit bps)Audio Input4ChAudio Input Parameter2Vp-p Line, 1OK Ohm , Shard ... Port1 USB2.0, 1 SDVehicle Status Monitor port6,1 for speedAlarm Input4Ch,5V10mAAlarm Output2Ch,1A110VRecord modeContinuous, Cycle, Schedule, ...