SS1401D2 product is 3G Digital GSM Access Control. It mainly uses the 3G network. The main function can use keypad to enter the password to open the door. Different password can open different door locks, can control a total of two locks. Other features: Use the phone to open the door (it will turn off the call to avoid the cost). It can also send SMS to open the door.
The SS1106B-03 product is a GSM access control. It is rugged and assembled with an aluminum case. The product is small and easy to install. It uses the GSM network. Main function: Use the phone to dial it, it confirms the call number and opens the door and hangs the phone. You can also send SMS to open the door. It can control two door locks