Convenient remote operation: GSM door opener can be remotely operated by phone calls or text messages anywhere in the world. This allows you to easily control access to your property or equipment without being physically present. Flexible user management: The system allows you to add or delete users by sending SMS commands. You can also program relay switches to turn on or off for specified times, making it easy to manage access for different users with different needs. Safe and secure: GSM uses caller ID recognition to identify authorized users and ignore unknown calls. It can store up to 200 authorized phone numbers, ensuring only approved users can access your property or equipment. In addition, the system sends a text message confirmation to the owner or authorized phone after each operation. Compatibility: GSM is a quad-band device that works on GSM networks worldwide. This allows it to be used in a variety of applications including , barriers, garage doors, shutters and machinery. Cost-effective solution: GSM does not require any additional remote control or keypad, saving you installation and maintenance costs. Additionally, the system does not incur any call charges as it uses a GSM trunk switch to reject calls from unauthorized numbers., Manufacturer: MOOILKO