for GSM-AUTO 4G Remote Controller<br> Elevate your remote management capabilities with the GSM-AUTO 4G Remote Controller, a cutting-edge device designed for seamless global operation and versatile applications. Perfect for both personal and professional use, this controller allows for the remote management of various systems with ease and efficiency. Discover the key features that make the GSM-AUTO 4G an indispensable tool:<br> Global Wireless Connectivity<br> Connect to a 4G, 3G, or GSM network by inserting a SIM card (not included) into the GSM-AUTO 4G module. The device features a unique phone number, allowing you to control it from anywhere in the world without geographical constraints.<br> Cost-Effective Activation<br> Activate the device by calling its dedicated number. The GSM-AUTO 4G does not answer calls, thus preventing any call charges. Its logic automatically triggers one or two output relays in a pre-programmed sequence, ensuring efficient control without additional costs.<br> SMS-Based Control and Programming<br> Operate two independent switches by sending SMS commands. This feature enables you to manage devices like battery chargers and engine preheaters in an aircraft hangar, all from a single unit. Program the unit easily by sending specific text commands, ensuring flexibility and convenience.<br> Secure Access Management<br> Manage access for up to 100 authorized users with secure caller ID functionality. Only numbers in the white list can activate the GSM-AUTO, enhancing security. Easily add or remove users via text, providing you with comprehensive control over who can operate the device.<br> Flexible Relay Configuration<br> Each relay offers normally open and closed