Description :  VStarcam C37-AR Dual Antenna 720P IP Wireless IR Night Vision Smart Camera with AF117 Door Sensor + AF123 PIR Detector + AF104 Remote Control   Features :     ASK linkage alarm function.  Dual antenna.                                                                   Specification :                       System           OS           Embedded Linux OS                   system security           Three level user authority management                   online users           support 4 online visitors simultaneously                    DDNS           Free DDNS                    Control protocol           ONVIF 2.4 protocol、 high interoperability                   Processor           Hisilicon processor、built-in ARM926 @Max. 440MHz and a high-speed video co-processor.                   Reset           Long press for 15 seconds to restore back to factory settings                   Collection           Image sensor           1\/4inch 720p Progressive scan CMOS sensor                   CMOS           support AWB、 AGC、 BLC                   sensor size           3.84mmx2.16mm                   SNR           ≥39dB                   Minimum illumination           0.8Lux\/F1.4 (colourful model )、0.3Lux\/F1. (B&W mode)                   Lens\/viewing angle           3.6mm@F1.4\/56.14\u02da                   Night vision           Dual IR-CUT filter auto switch、 9pcs 850nmΦ5mm LED、10m IR distance                   IR control            IR turned on: night vision view enabled、 infrared Ray、 ICR auto detect.      IR turned off: night vision disabled、 infrared ray off、 ICR stay in day view mode.                    Video           Compression Format           H.264 Main Profile\/H.264 Baseline Profile\/MJPEG\/JPEG Baseline                   Video coding process           Multi-stream: 720P\/24fps+VGA\/30fps+QVGA\/30fps+720P @1fsJPEG snapshot                   Resolution            720p\/VGA\/QVGA                   Bit Rate           CBR\/VBR、 output bit rate range: 128-4096kbps                   Frame rate           25fps                   Picture Adjustment           Contrast、 brightness、 saturation、 chroma are adjustable.                   Audio           Input           Built in -48dB Microphone                    Output           Built in speaker(8Ω1W)                   Sampling frequency \/ width           8KHz\/16bit                   Compression format           ADPCM\/32kbps                   Network           Interface           10Base-T \/ 100Base-TX、 RJ45 connector                    Network Protocol           TCP\/IP、HTTP、TCP、UDP、SMTP、FTP、DHCP、DNS、DDNS、NTP、UPnP、RTSP、P2P、ONVIF etc.                   WIFI           WiFi802.11b\/g\/n                   Antenna           3dBi antenna、 stronger si