Sm a rt living-for orrice/home security,access control and automation in one system, and door release. Advanced version-can be connecting with multi-entrance: or call to the guard room,even intercom with other handset,auxiliary button for light switch,alarm trigger...etc Ba sic fe a tures Lighted nameplate & weather - proof aluminum panel casing: Visual ** by LED and bell sound on the handset: Volume adjustment:ring adjustment and mute(optional) *Simple,safe and secure access control system *multi-handset(connects to two doorstations or guardroom, specify version). *Multi-handset(connects to extra handset for intercom,specify version). *Communication between handsets *Dry contact or 12V350mA powet for automations ie gate opener,light,alarms...etc *Flush mounting or surface mounting door static case (double insulation) *High graded aluminum panel in weather proof ABS plastic case (double insulation) *Power supply is using energ