DVR Model:GC-631x [Camera Function]Adopt low consumption power CMOS image sensor,CCTV Camea display clear image,Tiny size for discreet observation and portability,CCTV Camera with main units transmission distance is 100m without obstruction. [Home Security Systems Products feature] GC-630x Integrated Home Security System ● Global leading joint operation of wireless alarm and motion detection recording ● Adopting 2.4G wireless transmission surveillance image signal ● Supporting 8 zones, independent arming/disarming of each zone, and a maximum of 99 sensors ● Arm/disarm, emergency alarm, recording, and on-site listening by main unit, remote control, or telephone. ● A number of preset telephone numbers for alarm, and automatic dialing of alarm call ● SD card, automatic overwriting, cyclic recording, featuring low cost, energy saving, and vibration prevention ● 2.8" TFT display (optional) for recording playback, and supporting display by TV or computer monitor ● Easy to install and use, featuring a true DIY home security system [Home Security Sytems Technology Indexes] Main Indexes for Wireless Sensor Operating voltage 3V,two AA alkali batteries Quiescent current ≤25uA Alarm current ≤15mA Battery life One year,depending on actual conditions Operating temperature -10℃ ~+50℃ transmitting frequency 315MHz or 433MHz Coding format 2262/1527/ rolling code Transmission distance 100m(in open field without obstruction) Main Indexes for Wireless Camera Operating voltage 8V(CMOS Camera) or 12V(CCD camera) Operating current <150mA Operating temperature -10℃ ~+50℃ transmitting frequency 2.4GMHz,4CH Transmission distance 100m(in open field without obstruction) Camera resolution 628*582 Camera Size 1/3 inch Main Indexes for Main Unit Operating voltage 9~12VDC Same Home, Different security Feeling..