... installation9.warranty:12 months10.language optional11.support 4 channel cameras,360 degree full view record in real time12.professional dvr ... and video synchronization files directly outputAlarmAlarm input1 for speed signal,1 for ignition signal,3 for ordinary signal inputbuzzerOne buzzer alarmNetwork PortRJ45,10M ... included );150*149*62(shock mount included) 2.5 inch 360 degree 2012 Blackbox for car