The 2N® Helios IP Verso security intercom is configurable to your needs thanks to its modularity. It provides reliable access control and allows you to easily interface with other systems, achieving even higher site security. Now also available with a Bluetooth module or touchscreen.  There must be just one (with/without a camera) main unit in every installation. The main unit installation requires two frame/box positions; the other position, however, is left for additional module installation. Signalling protocol           SIP 2.0 (RFC - 3261) Audio Microphone          1 built-in microphone Speaker                               2W Audio codecs                     G.711, G.729, G.722, L16/16kHz Camera resolution           1280 x 960 (JPEG), 640 x 480 (video call) Viewing angle                    120° (H), 90° (V), 145° (D) Night vision                        Yes Video codecs                     H.263+, H.263, H.264, MJPEG, MPEG-4 RFID card reader supported frequencies:             13.56MHz & 125 kHz Support for NFC               Yes Power supply                    12V ± 15%/ 2A DC, or PoE PoE                                        PoE 802.3af (Class 0 - 12.95W) LAN                                        10/100BASE-TX with Auto-MDIX, RJ-45 Switch output                    NC/NO contacts, max 30 V/1 A AC/DC Active switch output      8 to 12 V DC depending on Power supply (PoE: 10 V; adapter: source voltage minus 2 V), max 400mA Supported protocols      SIP2.0, DHCP opt. 66, ONVIF, SMTP, 802.1x, RTSP, RTP, TFTP, HTTP, HTTPS, Syslog Operating temperature                -40°C – 60°C Operating relative humidity        10%-95% (non-condensing) Officially certified outdoor coverage level             IP54, IK08