Enhance your control systems with our innovative 7-Channel 4G Relay Switch Control, a versatile and robust solution designed to provide seamless remote management through advanced technology. This relay switch is perfect for various applications, offering flexibility, reliability, and ease of use for any setting. Seven Independent Relay Switches: Featuring seven independent relay switches, this module allows you to activate the NO.1 relay switch by dialing its dedicated phone number. The GSM-RELAY-4G connects to the 4G mobile network, enabling you to turn the switch on or off via SMS. Cost-Efficient Call Management: The relay switch intelligently refuses calls without answering, ensuring that there are no call charges. It identifies authorized phone numbers, maintaining secure and cost-effective operations. Global 4G Connectivity: Designed for global use, this relay switch operates over 4G, 3G, and GSM networks, allowing remote password operations and changes from anywhere in the world. It ensures you have control no matter your location. Versatile Operation Modes: Each relay output can function in either switch mode or pulse timing mode. The system supports both free control mode and security authorization number control mode. Programming is simple and can be done in minutes using mobile phones or PC software. Customizable Features: To save on costs, you can disable the SMS reply function. The device supports equipment operation history logging and custom commands, with two output modes: relay output via call mode and relay output via SMS control. High-Capacity Relay