GSM Audio Intercom , AC/DC12V 24V Gate Opener Access Controller , ABS Box Rainproof Design , Gate Opener System Provides 2 way Voice , for Home/Office/Hotel

TWO WAY VOICE：This audio intercom provides two way voice. Caller ID access control allows a known number to call the device. When the call arrives, it is immediately discarded, and if the number is known, the door or door is released. DUAL RELAY OUTPUT：GSM audio intercom has dual relay output for easy control of door openers or alarm components.Press the remote control relay output through the keyboard while talking to the visitor.If the person answering the call wishes to allow access, they simply release the on board relay by pressing the button on the handset. WITHOUT SCREW LOCKING：The front panel of audio intercom access is installed without screw locking for easy installation.It is suitable for mobile phones, and up to 200 users can operate the gate in this way.Even during a call, you can press the button on the phone's keypad to open the door for the visitor. BATTERY REMINDER：The battery can be reconnected internally (not included) for operation and alarms during a power outage, and the battery will automatically fail when the normal power supply is working again. It also alerts if the battery is low. SERVICE GUARANTEE：We have a professional customer service team. Please contact customer service in time if you have any questions, we will solve them as soon as possible. Hope you have a good shopping experience. Please allow a slight error due to manual measurement.