... It is portable. GPRS/GSM Video Encoder CH-2041LG (2GB) This video encoder can be connected to 4 analog cameras ... ;3. Scheduled arm/disarm and record;4. Support motion detection for each connected camera, and/or wireless sensors ... quad BNC outAudio1 way, earphone output socketMotion detectionMulti-area motion detection, sensitivity adjustableAlarmSMS, MMS/Email with snapshotsSirenSiren connector ...