Description: One DIN input for opening the door inside, press to open the door. One key to dial, press to call the first 5 authorization numbers. If it is connected ,press # to open the door. 200 authorized telephone numbers, each number can be called in to open the door in the setting period. After the authorized number calls in to open the door, it can send SMS to inform users. The opening time can be set for 0-999 seconds. 0 indicates that the relay is closed for 0.5 seconds then it breaks off. 999 indicates that the relay is closed all the time, until the authorized number calls in again, then it breaks off. Query the current state of the device via SMS (relay status and GSM signal value) Perfect for home, company, factory. warehouse, etc Specification: Color: Black Size: approx. 130x55x38mm/5.11x2.16x1.49 inches GSM frequency: 850/900/1800/1900MHz Relay rating: 3A / 240VAC Power consumption: 12V input, maximum 50 Ma SIM card: supports 3V SIM card Temperature range: -20- + 60? Relative humidity: 10%-90% Weight: approx. 335g Package Includes: 1 Piece GSM Apartment Intercom 1 Piece Screws Kits 1 Piece User Manual 1 Piece Antenna
