Never guess who s at your door from anywhere in the world. Doorbird has developed a high end and phenomenal looking doorbell intercom system thats been Rated Number 1 by Professional Integrators. See, talk and open your door all from your phone • Designed and Manufactured in Germany and made to work as a standalone unit or an accessory to your Control4, Crestron, Savant, URC control system or in conjunction with IP Video Recorder (NVR) and other smart home Systems like Homeseer or Vera • Unit comes with retrofit or pre-construction back box to be Flush-Mounted. Also comes with RJ45 for LAN/POE Connectors. Not included 2 wire POE adaptor can be used with current doorbell wires as an alternative to running a hard wire that provides data and power to the unit. Recommended if you don t plan on running a CAT5/6 to door station • Unit is 5.16 inches wide and 9.96 inch long and recommended to be mounted at least 49 inches high. The unit may also be surface mounted with a back box that is sold separately. The unit will function in harsh weather temperature ranging from -13 to 131 Fahrenheit • Works great for gates or doors that have lock strike integrations. Comes ready to open and close gates with a push of a button on the IOS or Android app or with the RFID Card Reader