Dial to open the door by Authorized Numbers
Remote open the door for visitors.
User Friendly Design, No more Wiring Installation.
High Quantity Two-way Voice Communication
Per Supply : 9-15V
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.
Query the current state of the device via SMS (relay status and GSM signal value)
Relay Rating: 3A/240VAC