2G 4G Door & Gate Intercom/Wireless Intercom System for Door & automatic electric Gate Access

Built-in rechargeable battery for working and alarm when power is off, the battery will be charged automatically when the power is back to normal. Also, there will be an alert if the battery is low. Feel like you're at home when you're away and never miss a delivery Convenient and Secure Vandal Resistant GSM Intercom for Apartments, Apartments or Offices. Innovative waterproof lock design and stainless steel front, panel vandal resistant design, rugged stainless steel call point. Outgoing when the user presses the call button will dial up to 2 phone numbers in sequence, e or landline. Front panel installation does not use screws, locks for easy installation and safety Dual relay outputs are optional for easy control of door openers or alarm components Press the button to remotely control the relay output while talking with the visitor