... GPS 2.GPS,3G is optional 3.D1,CIF record 4.4ch video,Alarm input 5.built-in buzzer Cheapest 4ch ... in SD card for better safety and anti-vibration performance10.4 sets of alarm input ports,built-in buzzer11.Support record video ... output 1CH outputAudio output 1CH outputAlarm input 4 alarm inputAlarm output BuzzerDisplay mode Full Screen, 4 SplitRecord resolutionhighest D1 720 x 480D1 ...