SIP 6 buttons intercom with 2 voice channels Full Duplex (AEC) (Audio Codecs: G.711 PCM, 64 kbps, G.729, G.722, L16/16kHz). RFID card reader ready (not included. Supported 125kHz cards: EM4100, EM4102, HID® Prox™), or different additional pannels or expansion sets (not included). Interface Ethernet using screw plug connector, Ethernet speed 10/100 BASE-T. Relay outputs: Maximal voltage 30 V DC, Maximal current 1 A DC. Active output: 10V – 14V DC/700mA. Power supply 802.3af (PoE) 48 V / 380 mA DC or Adaptor 100-230 V10%, 50/60 Hz / 12V DC, DC power supply 12 V / 2A DC. Dimensions: 210x100x29 mm (h×w×d). Weight: max. 500 g. Operating temperatures: from –4 to 131 ºF. Cover level: IP 53.