8 x Apartment 3G GSM Intercoms with Electric Door Latch Fail Secure

12v Automatic Door Latch with secondary lock recess

8 x Apartment 4G GSM Intercoms with Door Release Outputs

2G 3G GSM INTERCOM FOR GATE AUTOMATION,ACCESS CONTROL,AUTOMATIC

K6 Gsm 3g Access Control & Apartment Intercom System - Access

GSM Intercom, Remote Communication & Control of Gate or Lock

UltraCOM 4G GSM Gate Intercom, GSM 4G Door Intercom

UltraCOM3 Eight Apartment Wireless Intercom - Ultra Secure US

UltraCOM 4G GSM Gate Intercom, GSM 4G Door Intercom

8 x Apartment 3G GSM Intercoms with Electric Door Latch Fail Safe

8 x Apartment 3G GSM Intercoms with Electric Door Latch Fail Safe

Outdoor Door Access Control System Kit 3G GSM Access

12v DC H/D Electronic Door Latch with Guide (Fail Secure) [006-3580]