WCDMA FREQUENCY(Optional) A: Dual-Band UMTS/HSDPA 850/1900MHz Quad-Band GSM/GPRS/EDGE 850/900/1800/1900MHz E: Dual-Band UMTS/HSDPA 900/2100MHz Tri-Band GSM/GPRS/EDGE 850/900/1800MHz J: Dual-Band UMTS/HSDPA 850(800)/2100MHz Quad-Band GSM/GPRS/EDGE 850/900/1800/1900MHz Main features: 1.Monitoring video by dialing-in camera based on 3G sim cards via remote control. 2.With PTZ, Pan 0-360 degree and Tilt 0-90 degree rotation 3.With 1200 mA backup battery to make sure the system could continue to work when AC power is off. 4.Remote control the camera to arm/disarm/turn on siren/turn off siren/2-way talking/digital zoom etc during 3G video call. 5.Active alarm function: Can work with 433mhz alarm sensors, PIR sensor, smoke sensor, etc, 5X Digital Zoom function to make you see clear image on your 3G phone. Auto dial 5 group phone numbers presetting, send SMS/MMS alert after system triggered. 6.Setup by SMS,Dial-in/SMS to remote control the camera to watch monitoring video via 3Gphone 7.SMS notification if any sensor is triggered 8.Security and reliability,End-to-end video transmission is better for protect user’s privacy 9.Video mode:Alarm video,video telephone. 10.3 wired zones ABC and 88 wireless zones. 11. User permission function, Can be set up 5 groups access permission. 12. External 4G TF card,4000 photos Can be stored 13. conform to CE,ROSH,FCC international certification standards.